Resolved J-74: Clean maven config to reflect moving to JDK 7.

- Removed JDK 7 (or higher) specific maven pom profiles
- Moved JDK 7 or higher unit tests to the location of all the unit tests

Change-Id: I97727a8e7fe8e14a01c96dbb7efed4be246af1fe
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>