XD-1937 - Added licenses for all third party dependencies that are not Apache 2.0
XD-1999 Remove unused post module references

- Remove the classes that were used by `post` source module which
no longer exists.
XD-1999 - Remove unused post module references

Remove from configuration classes
XD-1936 - remove mysql client library from distribution zip
XD-1930: Fix java8 compile warning

ContainerConfiguration is now a (still default visibility & top level)
non-auxiliary class.