[JIRA] (OVIRT-2199) Set content security policy at Jenkins startup

Set content security policy at Jenkins startup ---------------------------------------------- Key: OVIRT-2199 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-2199 Project: oVirt - virtualization made easy Issue Type: Task Reporter: Daniel Belenky Assignee: Evgheni Dereveanchin Labels: jenkins, standard-ci, stdci-summary STDCI summary requires some content security policy to be set so that Jenkins won't add blocking headers to the summary HTML. The required policy is: {code:java} sandbox allow-scripts; default-src 'self' https://cdnjs.cloudflare.com; img-src 'self'; style-src 'self' https://cdnjs.cloudflare.com; {code} Documentation can be found [here|https://wiki.jenkins.io/display/JENKINS/Configuring+Content+Security+Policy]