manager: allow running at non-standard path

Add an optional argument to the daemon to allow the persistent
location to be a non-standard path.  This enables running the
application as a normal user on a developer system rather than
requiring it to be installed in a full BMC image.

Tested:

Ran with `biosconfig-manager /tmp/bios-config-manager`:

```
$ busctl --user tree xyz.openbmc_project.BIOSConfigManager
└─ /xyz
  └─ /xyz/openbmc_project
    └─ /xyz/openbmc_project/bios_config
      ├─ /xyz/openbmc_project/bios_config/manager
      └─ /xyz/openbmc_project/bios_config/password
```

Change-Id: I42f688e233060c43983d2690facbb1026e678c77
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/src/password.cpp b/src/password.cpp
index 03aeb79..6503e53 100644
--- a/src/password.cpp
+++ b/src/password.cpp
@@ -15,7 +15,6 @@
 */
 #include "password.hpp"
 
-#include "config.hpp"
 #include "xyz/openbmc_project/BIOSConfig/Common/error.hpp"
 #include "xyz/openbmc_project/Common/error.hpp"
 
@@ -235,7 +234,8 @@
     }
 }
 Password::Password(sdbusplus::asio::object_server& objectServer,
-                   std::shared_ptr<sdbusplus::asio::connection>& systemBus) :
+                   std::shared_ptr<sdbusplus::asio::connection>& systemBus,
+                   std::string persistPath) :
     sdbusplus::xyz::openbmc_project::BIOSConfig::server::Password(
         *systemBus, objectPathPwd),
     objServer(objectServer), systemBus(systemBus)
@@ -243,7 +243,7 @@
     lg2::debug("BIOS config password is running");
     try
     {
-        fs::path biosDir(BIOS_PERSIST_PATH);
+        fs::path biosDir(persistPath);
         fs::create_directories(biosDir);
         seedFile = biosDir / biosSeedFile;
     }