sal-remoterpc-connector: sync ch.qos.logback:logback-classic version

The following commit:

  8079442 Enhancements to remote rpc server. Using zmq router-dealer bridge

introduced a new version dependency on ch.qos.logback:logback-classic.
Let's make this dependency consisten with the rest of the project by
moving from 1.0.12 back to 1.0.9.

Change-Id: I3bd7e3ce7d5c4af36fad8ddf7ee883117d9c4386
Signed-off-by: Chris Wright <chrisw@sous-sol.org>