Bug 1303: BindingIndependentConnector splitted.

Inner private classes in BindingIndependentConnector extracted into standalone package protected classes.
Fixed bug in BindingToDomTransaction class - domOpenedTransactions management.

Change-Id: I69173db2bf4e6746eac4fa67c57f65095f45c603
Signed-off-by: Lukas Sedlak <lsedlak@cisco.com>
Merge "Bug 1303: BindingIndependentConnector splitted."