[maven-release-plugin] prepare for next development iteration

Change-Id: Ie8ae9ecb321e94b4ba928d9c93afcd4e10ca62dd
Prepare pom for 3.0.6 release

We skipped 3.0.5 of kmf-repository-api
because of issues with its pom for first
public release, so we need to depend from
3.0.6 and release a 3.0.6.

Change-Id: I31447f1f0a0ec1475d441d9958e371ec1655f471
[maven-release-plugin] prepare release kmf-content-api-3.0.6

Change-Id: I83c39cad4110a6fe00fdb88eb996c2a7f76c82d1