findbugs: nullpointer dereference guarded(cherry picked from commit
43ba36f97950aa8d09399a28bb50c6a22209f15e)
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/cloudstack.git
findbugs: moved call on static object to synchronized block(cherry
picked from commit f3529a19a9aad36dbd92e311018643629f19c748)
Findbugs: scariest issues in ApiResponseHelper fixed (cherry picked from
commit 9a1b882d0eb871c64fe0f0f3fbafbabae89188fa)
findbugs: fixes for ApiServer, ApiSerializerHelper and
ApiXmlDocWriter(cherry picked from commit
9aced41d708acd22b43ef0e512fa2cc657a6c0a2)