logging: replace direct journal calls with lg2

Tested:

Created a bogus journal message equivalent to the one in
TachSensor.hpp as the first line of 'main' in FanMain.cpp:

```
    auto device = "FooBar";
    auto msg = "OpenBMC.0.1.FanInserted";
    lg2::error("Fan Inserted", "REDFISH_MESSAGE_ID", msg,
               "REDFISH_MESSAGE_ARGS", device);
```

Observed the following in the journal:
```
{
	"_MACHINE_ID" : "115e76f3bc47411eb0f20075b13444e9",
	"_CMDLINE" : "/usr/bin/fansensor",
	"REDFISH_MESSAGE_ID" : "OpenBMC.0.1.FanInserted",
	"CODE_LINE" : "463",
	"_COMM" : "fansensor",
	"_EXE" : "/usr/bin/fansensor",
	"_SOURCE_REALTIME_TIMESTAMP" : "33256618",
	"__MONOTONIC_TIMESTAMP" : "33256849",
	"SYSLOG_IDENTIFIER" : "fansensor",
	"PRIORITY" : "3",
	"_CAP_EFFECTIVE" : "1ffffffffff",
	"_PID" : "296",
	"_UID" : "0",
	"_SYSTEMD_UNIT" : "xyz.openbmc_project.fansensor.service",
	"REDFISH_MESSAGE_ARGS" : "FooBar",
	"__REALTIME_TIMESTAMP" : "33256822",
	"LOG2_FMTMSG" : "Fan Inserted",
	"_SYSTEMD_CGROUP" : "/system.slice/xyz.openbmc_project.fansensor.service",
	"_GID" : "0",
	"_TRANSPORT" : "journal",
	"__CURSOR" : "s=039afc05fc934fe08b77dd73c4092591;i=1ff;b=5ad25f16b9bd424ebe72cf30558fcdc2;m=1fb7591;t=1fb7576;x=617adeeaf1da9edc",
	"CODE_FILE" : "../../../../../../../../sync/openbmc-sources/dbus-sensors/src/FanMain.cpp",
	"_SYSTEMD_INVOCATION_ID" : "9eef21c4b7784ba2aa2628f162079cd3",
	"CODE_FUNC" : "int main()",
	"MESSAGE" : "Fan Inserted",
	"_HOSTNAME" : "bletchley",
	"_SYSTEMD_SLICE" : "system.slice",
	"_BOOT_ID" : "5ad25f16b9bd424ebe72cf30558fcdc2"
}
```

Observed the following in /var/log/redfish:
```
1970-01-01T00:00:27.345477+00:00 OpenBMC.0.1.FanInserted,FooBar
```

Observed the following in Redfish:
```
{
      "@odata.id": "/redfish/v1/Systems/system/LogServices/EventLog/Entries/27",
      "@odata.type": "#LogEntry.v1_4_0.LogEntry",
      "Created": "1970-01-01T00:00:27+00:00",
      "EntryType": "Event",
      "Id": "27",
      "Message": "FooBar inserted.",
      "MessageArgs": [
        "FooBar"
      ],
      "MessageId": "OpenBMC.0.1.FanInserted",
      "Name": "System Event Log Entry",
      "Severity": "OK"
    }
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ib408e97ff99863cd91bcbcb43a4738d773f4e21c
diff --git a/src/PSUEvent.cpp b/src/PSUEvent.cpp
index 23021d9..b02816f 100644
--- a/src/PSUEvent.cpp
+++ b/src/PSUEvent.cpp
@@ -14,13 +14,12 @@
 // limitations under the License.
 */
 
-#include <systemd/sd-journal.h>
-
 #include <PSUEvent.hpp>
 #include <SensorPaths.hpp>
 #include <boost/asio/io_service.hpp>
 #include <boost/asio/read_until.hpp>
 #include <boost/container/flat_map.hpp>
+#include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/asio/object_server.hpp>
 
@@ -319,22 +318,18 @@
             if (!deassertMessage.empty())
             {
                 // Fan Failed has two args
-                std::string sendMessage = eventName + " deassert";
                 if (deassertMessage == "OpenBMC.0.1.PowerSupplyFanRecovered")
                 {
-                    sd_journal_send(
-                        "MESSAGE=%s", sendMessage.c_str(), "PRIORITY=%i",
-                        LOG_INFO, "REDFISH_MESSAGE_ID=%s",
-                        deassertMessage.c_str(), "REDFISH_MESSAGE_ARGS=%s,%s",
-                        psuName.c_str(), fanName.c_str(), NULL);
+                    lg2::info("{EVENT} deassert", "EVENT", eventName,
+                              "REDFISH_MESSAGE_ID", deassertMessage,
+                              "REDFISH_MESSAGE_ARGS",
+                              (psuName + ',' + fanName));
                 }
                 else
                 {
-                    sd_journal_send(
-                        "MESSAGE=%s", sendMessage.c_str(), "PRIORITY=%i",
-                        LOG_INFO, "REDFISH_MESSAGE_ID=%s",
-                        deassertMessage.c_str(), "REDFISH_MESSAGE_ARGS=%s",
-                        psuName.c_str(), NULL);
+                    lg2::info("{EVENT} deassert", "EVENT", eventName,
+                              "REDFISH_MESSAGE_ID", deassertMessage,
+                              "REDFISH_MESSAGE_ARGS", psuName);
                 }
             }
 
@@ -363,22 +358,18 @@
                 }
 
                 // Fan Failed has two args
-                std::string sendMessage = eventName + " assert";
                 if (assertMessage == "OpenBMC.0.1.PowerSupplyFanFailed")
                 {
-                    sd_journal_send(
-                        "MESSAGE=%s", sendMessage.c_str(), "PRIORITY=%i",
-                        LOG_WARNING, "REDFISH_MESSAGE_ID=%s",
-                        assertMessage.c_str(), "REDFISH_MESSAGE_ARGS=%s,%s",
-                        psuName.c_str(), fanName.c_str(), NULL);
+                    lg2::warning("{EVENT} assert", "EVENT", eventName,
+                                 "REDFISH_MESSAGE_ID", assertMessage,
+                                 "REDFISH_MESSAGE_ARGS",
+                                 (psuName + ',' + fanName));
                 }
                 else
                 {
-                    sd_journal_send(
-                        "MESSAGE=%s", sendMessage.c_str(), "PRIORITY=%i",
-                        LOG_WARNING, "REDFISH_MESSAGE_ID=%s",
-                        assertMessage.c_str(), "REDFISH_MESSAGE_ARGS=%s",
-                        psuName.c_str(), NULL);
+                    lg2::warning("{EVENT} assert", "EVENT", eventName,
+                                 "REDFISH_MESSAGE_ID", assertMessage,
+                                 "REDFISH_MESSAGE_ARGS", psuName);
                 }
             }
             if ((*combineEvent).empty())