FELIX-3910: Back ported the new SerialExecutor from the upcoming dependency 4.0 version, and using it in the
ServiceDependencyImpl, as well as in the ComponentImpl class, especially for fixing the FELIX-4002 issue.


git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1607340 13f79535-47bb-0310-9956-ffa450edef68