Handle SdBusError exception in setting time

sdbusplus now throws SdBusError exception when a sd bus call fails.
When setting time via systemd timedatectl service, it may fail to set
time due to time settings.
So handle this exception and print the reason.

Tested: Verify this service does not crash but prints the exception in
        journal log, when it fails to set time to systemd.

Change-Id: I7d3b2e35e58c3924f95d3664653e68efbae8bd14
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/epoch_base.cpp b/epoch_base.cpp
index e130578..8aa41dd 100644
--- a/epoch_base.cpp
+++ b/epoch_base.cpp
@@ -52,13 +52,17 @@
     method.append(static_cast<int64_t>(usec.count()),
                   false, // relative
                   false); // user_interaction
-    auto reply = bus.call(method);
-    if (reply.is_method_error())
+
+    try
+    {
+        bus.call_noreply(method);
+    }
+    catch (const sdbusplus::exception::SdBusError& ex)
     {
         log<level::ERR>("Error in setting system time");
         using namespace xyz::openbmc_project::Time;
         elog<FailedError>(
-            Failed::REASON("Systemd failed to set time"));
+            Failed::REASON(ex.what()));
     }
     return true;
 }