Increase robustness for TCA

Increase robustness for TCA

Enhanced TCA robustness against unprovisioned topics.
When the configuration tells TCA to subscribe to a non-existent MR topic,
TCA will attempt but stop because subscribing to such topics resulted
failure.  The enhancements implemented here will test for sub topic, and if
non-existent, make a publish to create the topic.
Additional enhancements include:
1. restart TCA is the number of workers is below expected (3);
2. allow MR subscriber group and id be set via environment variables
DMAAPSUBGROUP and DMAAPSUBID.
3. Minor version is bumped.

Issue-ID: DCAEGEN2-502
Change-Id: I3414a96706a1b720184cd657324db4d11db12590
Signed-off-by: Lusheng Ji <lji@research.att.com>