Rename project-config-compare-xml, project-config-gerrit

For consistency, add gate as prefix like we do for all other
jobs running in check or gate queue.

Change-Id: I60367068e1559892fd0fe7cdd421ed3696475bba

jenkins/jobs/infra.yaml

@@ -1,5 +1,5 @@
 - job:
-    name: project-config-compare-xml
+    name: gate-project-config-compare-xml
     node: 'bare-precise || bare-trusty'
 
     builders:
@@ -11,7 +11,7 @@
       - zuul-swift-upload-console-log
 
 - job:
-    name: project-config-gerrit
+    name: gate-project-config-gerrit
     node: 'bare-precise || bare-trusty'
 
     builders:

zuul/layout.yaml

@@ -1175,7 +1175,7 @@ jobs:
     failure-message: XML output has changed.
     success-message: XML output is unchanged.
 
-  - name: project-config-compare-xml
+  - name: gate-project-config-compare-xml
     voting: false
     failure-message: Jenkins XML output has changed.
     success-message: Jenkins XML output is unchanged.
@@ -2683,8 +2683,8 @@ projects:
     template:
       - name: merge-check
     check:
-      - project-config-compare-xml
-      - project-config-gerrit
+      - gate-project-config-compare-xml
+      - gate-project-config-gerrit
       - gate-project-config-grafyaml
       - gate-project-config-layout
       - gate-project-config-pep8
@@ -2697,7 +2697,7 @@ projects:
       - gate-generate-specs-site
       - gate-project-config-dib
     gate:
-      - project-config-gerrit
+      - gate-project-config-gerrit
       - gate-project-config-grafyaml
       - gate-project-config-layout
       - gate-project-config-pep8
@@ -2719,7 +2719,7 @@ projects:
     template:
       - name: merge-check
     check:
-      - project-config-compare-xml
+      - gate-project-config-compare-xml
       - gate-project-config-layout
       - gate-project-config-pep8
       - gate-project-config-jenkins-project