[JIRA] (OVIRT-973) add support for custom build params on build-on-demand jobs

add support for custom build params on build-on-demand jobs ----------------------------------------------------------- Key: OVIRT-973 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-973 Project: oVirt - virtualization made easy Issue Type: Bug Components: Jenkins Reporter: Greg Sheremeta Assignee: infra Labels: standard-ci mburman [reports|https://bugzilla.redhat.com/show_bug.cgi?id=1400010] that the nightly ovirt-engine build is missing the Chrome permutation. From the [build|http://jenkins.ovirt.org/job/ovirt-engine_master_build-artifacts-el...]: {noformat} 21:13:24 [INFO] Compiling 1 permutation 21:13:24 [INFO] Compiling permutation 0... 21:16:54 [INFO] Compile of permutations succeeded {noformat} That should compile 2 if we want Firefox and Chrome, or 3 if we also want IE. mburman reports this started on November 30. I'm not sure what changed. Adding build flags will fix: DEV_EXTRA_BUILD_FLAGS_GWT_DEFAULTS="-Dgwt.userAgent=safari,gecko1_8"