Switch opflex-verify job to a freestyle job

Switch opflex-verify job to a freestyle job

We'd like to remove the matrix node from Jenkins so migrating projects
off of the matrix job type is necessary. Since opflex doesn't build
against multiple jdks we can simplify the job a bit by removing the jdks
configuration.

Also switches opflex archiving to using logs.opendaylight.org via the
archive-build macro.

Also cleanup jdks and axis in files where they are unused and
unnecessary.

Change-Id: I4c5c42b7f15f3c263326706752b5cd929899d7d8
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>