Raise tests timeout

Conformance test results are not fully consistent from one run to the
other, so far one successful run followed by a run with 3 failed tests,
all 3 failing because of timeouts.
This commit tries to make the timeout longer, this will hopefully help
getting more consistent runs.

ci.sh

@@ -71,7 +71,7 @@ crc start -m 16000 -c 7 -p "${HOME}"/pull-secret -b crc_libvirt_*.crcbundle
 
 mkdir -p /tmp/artifacts
 export KUBECONFIG="${HOME}"/.crc/machines/crc/kubeconfig
-openshift-tests run openshift/conformance --dry-run  | grep -v -f /tmp/ignoretests.txt  | openshift-tests run -o /tmp/artifacts/e2e.log --junit-dir /tmp/artifacts/junit -f -
+openshift-tests run openshift/conformance --dry-run  | grep -v -f /tmp/ignoretests.txt  | openshift-tests run --timeout 15m -o /tmp/artifacts/e2e.log --junit-dir /tmp/artifacts/junit -f -
 rc=$?
 echo "${rc}" > /tmp/test-return
 set -e