Fix ansible server config

Added ansible server to docker-compose.yml and made a few config changes:
 - redirect of output in final exec causes exec to fail.  Instead, need
   to redirect output in standalone exec line.  Redirected to
   /var/log/ansible-server.log
 - Updated LCM config to use ansiblehost alias to reach ansible
   (was incorrectly using 0.0.0.0)

Change-Id: I4b1b6bbc5f3df6f480333d53adda4c8e6e0d6510
Issue-ID: SDNC-288
Signed-off-by: Timoney, Dan (dt5972) <dt5972@att.com>
Former-commit-id: 50c65c2c7cd92db6d14215114d098b33da5f618d