rename jbosstools-integration-tests to jbosstools-itests

To be consistent and more clear about purpose/content, I propose we rename the github project jbosstools-integration-tests to jbosstools-itests.

Once renamed, will need to refactor:

• job name
• destination publishing folder - http://download.jboss.org/jbosstools/updates/nightly/integrationtests/ -> http://download.jboss.org/jbosstools/updates/nightly/itests/