watchdog: Get only the initialized property during reset

Since we switched to resetting the watchdog with a built-in method, we
are only using a single property from the watchdog. Instead of fetching
all the properties and reading just the initialized one, only request
the initialized property from the watchdog.

Change-Id: I5e29b5100629e1ce23f352b0b749a434cd1ab793
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/app/watchdog.cpp b/app/watchdog.cpp
index dbd7426..da8ccf3 100644
--- a/app/watchdog.cpp
+++ b/app/watchdog.cpp
@@ -31,11 +31,10 @@
     try
     {
         WatchdogService wd_service;
-        WatchdogService::Properties wd_prop = wd_service.getProperties();
 
         // Notify the caller if we haven't initialized our timer yet
         // so it can configure actions and timeouts
-        if (!wd_prop.initialized)
+        if (!wd_service.getInitialized())
         {
             return IPMI_WDOG_CC_NOT_INIT;
         }