Use snapshot version of controller artifacts.

Other changes:

  * Upgrade maven plugins.
    * maven-enunciate-plugin 1.28
    * maven-bundle-plugin 2.4.0
    * maven-dependency-plugin 2.8
    * maven-clean-plugin 2.5
  * Ignore configuration directory created by integration tests.

Change-Id: I244805d1de0ffb932aeade518bc0a3fc8c935021
Signed-off-by: Shigeru Yasuda <s-yasuda@da.jp.nec.com>