[JIRA] (OVIRT-1889) Configure gerrit-trigger plugin to use REST API

Configure gerrit-trigger plugin to use REST API ----------------------------------------------- Key: OVIRT-1889 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1889 Project: oVirt - virtualization made easy Issue Type: Improvement Reporter: Evgheni Dereveanchin Assignee: Evgheni Dereveanchin Currently Jenkins is configured to use SSH to query Gerrit. There is an option to enable the REST API as well which is useful when event-log plugin is installed on the Gerrit ( OVIRT-1196 ). Jenkins tries to connect to the API to confirm if the plugin is installed which is currently flooding the logs with messages like this: INFO: Started GerritMissedEventsPlaybackEnabledChecker Feb 07, 2018 12:57:06 PM com.sonyericsson.hudson.plugins.gerrit.trigger.utils.GerritPluginChecker buildURL WARNING: REST API is not enabled. Feb 07, 2018 12:57:06 PM com.sonyericsson.hudson.plugins.gerrit.trigger.utils.GerritPluginChecker isPluginEnabled WARNING: Not able to verify if Gerrit plugin events-log is installed. REST URL cannot be null. Is the REST API Enabled? We should [configure|https://wiki.jenkins.io/display/JENKINS/Gerrit+Trigger#GerritTrigger-SetupRequirements] usage of the API to get rid of this message.