Temporrary disable japi packaging for opensuse

Temporrary disable japi packaging for opensuse

To unbreak verify job, caused by following message:

19:06:58 RPM build errors:
19:06:58     File not found: /w/workspace/vpp-verify-master-osleap15/build-root/rpmbuild/BUILDROOT/vpp-18.10-rc0~105_g0578e3f9~b1992.x86_64/usr/share/java/*
19:06:58 make[2]: *** [Makefile:50: RPM] Error 1
19:06:58 make[2]: Leaving directory '/w/workspace/vpp-verify-master-osleap15/extras/rpm'
19:06:58 make[1]: *** [Makefile:476: pkg-rpm] Error 2
19:06:58 make[1]: Leaving directory '/w/workspace/vpp-verify-master-osleap15'
19:06:58 make: *** [Makefile:541: verify] Error 2
19:06:58 Build step 'Execute shell' marked build as failure

Change-Id: Ie1300cbf70bedb9dd861a3f31feeddf1eb810eaf
Signed-off-by: Damjan Marion <damarion@cisco.com>