Reword some logs

Change-Id: I48b07dbf9d03a147245d748146e45d5963d21d9d
diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/OnStartStop.java b/src/main/java/com/googlesource/gerrit/plugins/manager/OnStartStop.java
index e0ad123..f1650d2 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/OnStartStop.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/OnStartStop.java
@@ -53,7 +53,7 @@
                     Collection<PluginInfo> plugins = pluginsCache.availablePlugins();
                     logger.atInfo().log("%d plugins successfully pre-loaded", plugins.size());
                   } catch (ExecutionException e) {
-                    logger.atSevere().withCause(e).log("Cannot access plugins list at this time");
+                    logger.atSevere().withCause(e).log("Failed to access plugin list");
                   }
                 }
               });
diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
index 3ad6100..55b4639 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
@@ -115,7 +115,7 @@
     }
 
     if (site.gerrit_war == null) {
-      logger.atWarning().log("Core plugins not available on non-war Gerrit distributions");
+      logger.atWarning().log("Core plugins not available in non-war Gerrit distributions");
       return ImmutableList.of();
     }