Skip Karaf Tests By Default

Karaf tests take far too long to run therefore we will skip by default.
OVSDB will create a daily job to check Karaf stability

Change-Id: I8bdb6b6f870956a78e45fa3973085a50f882126f
Signed-off-by: Dave Tucker <djt@redhat.com>
Signed-off-by: Madhu Venugopal <mavenugo@gmail.com>