Revert "core: supress findbugs warning in StorageServerConnectionCommandBase"

This reverts commit b9779fd9ede7950fe058efe29c706f8a150f7333.

Change-Id: I6408c9dfe053a37c57011596364ae6cb6d825323
Signed-off-by: Liron Aravot <laravot@redhat.com>