Fix bugs

Signed-off-by: Mario Danic <mario@lovelyhq.com>

build.gradle

@@ -46,7 +46,7 @@ repositories {
         url 'https://oss.sonatype.org/content/repositories/snapshots/'
     }
     google()
-    
+
     flatDir {
         dirs 'libs'
     }

src/gplay/java/com/owncloud/android/utils/PushUtils.java

@@ -167,7 +167,7 @@ public class PushUtils {
                     remoteOperationResult = unregisterAccountDeviceForProxyOperation.execute(mClient);
 
                     if (remoteOperationResult.isSuccess()) {
-                        arbitraryDataProvider.deleteKeyForAccount(account, KEY_PUSH);
+                        arbitraryDataProvider.deleteKeyForAccount(account.name, KEY_PUSH);
                     }
                 }
             }

src/modified/java/com/owncloud/android/utils/PushUtils.java

@@ -167,7 +167,7 @@ public class PushUtils {
                     remoteOperationResult = unregisterAccountDeviceForProxyOperation.execute(mClient);
 
                     if (remoteOperationResult.isSuccess()) {
-                        arbitraryDataProvider.deleteKeyForAccount(account, KEY_PUSH);
+                        arbitraryDataProvider.deleteKeyForAccount(account.name, KEY_PUSH);
                     }
                 }
             }