Do not run tests when building OVS for UBI

This change adds back the default `RPMBUILD_OPT` to disable
unnecessary tests when building OVS rpm packages, which was
previously overwritten in antrea-io#6052.

Signed-off-by: Xu Liu <xu.liu@broadcom.com>

build/images/ovs/Dockerfile.ubi

@@ -35,7 +35,7 @@ RUN cd /tmp/openvswitch* && \
     # logrotate needs to run as the same user as OVS to get the proper permissions of log files.
     # As Antrea runs OVS as root, we disable libcapng to make logrotate also run as root. 
     # See https://github.com/openvswitch/ovs/blob/v2.17.7/rhel/openvswitch-fedora.spec.in#L26-L27.
-    RPMBUILD_OPT="--without libcapng" make rpm-fedora && mkdir -p /tmp/ovs-rpms && \
+    RPMBUILD_OPT="--without libcapng --without check" make rpm-fedora && mkdir -p /tmp/ovs-rpms && \
     mv /tmp/openvswitch-$OVS_VERSION/rpm/rpmbuild/RPMS/*/*.rpm  /tmp/ovs-rpms && \
     rm -rf /tmp/openvswitch*