Merge pull request #4512 from jlmitch5/projBranchFix

clear out branch/prompt on jt form when project changes

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

awx/ui/client/src/templates/job_templates/edit-job-template/job-template-edit.controller.js

@@ -82,6 +82,11 @@ export default
 
                 $scope.$watch('project', function (newValue, oldValue) {
                     if (newValue !== oldValue) {
+                        if (oldValue) {
+                            $scope.scm_branch = null;
+                            $scope.ask_scm_branch_on_launch = false;
+                        }
+                        
                         var url;
                         if ($scope.playbook) {
                             $scope.playbook_options = [$scope.playbook];