Updated version to 3.2.0-SNAPSHOT

Change-Id: Iacd64c98cb77942726e904d6368894bcf0ccd9a0
References #2727: Updated Karaf to version 3.0.1
Revert Karaf 3.0.1 upgrade.

This reverts commit f3400a7b98ed8e8a3e3b49a470c613537fc3f937.
Updated to Karaf 2.3.5.
Updated to target Java 7.
JavaDoc version has been updated to Java 7.
Version number has been set to 3.2.0.
Merge branch 'release/3.2.0 for 3.2.0 release.'