Add value 'global' for defaults in jobs

Parameter 'defaults' shouldn't be empty.
It's required by jenkins job builder.
Increase timeout for global defaults.

Change-Id: If9e14c9123a7644921f89f2c93220994f8382252

jenkins_job_builder/defaults.yaml

@@ -17,7 +17,7 @@
 
     wrappers:
       - timeout:
-          timeout: 30
+          timeout: 120
           fail: true
       - timestamps
 

jenkins_job_builder/diskimage.yaml

@@ -1,6 +1,6 @@
 - job-template:
     name: 'diskimage-integration-{plugin}'
-    defaults:
+    defaults: global
     concurrent: false
     builders:
       - gerrit-git-prep
@@ -22,7 +22,7 @@
 
 - job-template:
     name: 'diskimage-integration-vanilla-{image}'
-    defaults:
+    defaults: global
     concurrent: false
     builders:
       - gerrit-git-prep

jenkins_job_builder/sahara-ui.yaml

@@ -1,7 +1,7 @@
 - job:
     name: gate-ui-tests
     project-type: freestyle
-    defaults:
+    defaults: global
     description: "<b>This job is managed by Jenkins Job Builder, do not edit it through WebUI.\
                   \n<p>Please use this repository to make changes: <a href=\"https://github.com/stackforge/sahara-ci-config\">https://github.com/stackforge/sahara-ci-config</a></b>\
                   \n<p><b>Title</b>: Tests for savanna dashboard<br/>\

jenkins_job_builder/sahara.yaml

@@ -1,6 +1,6 @@
 - job-template:
     name: 'gate-saharaclient-integration-{plugin}'
-    defaults:
+    defaults: global
     concurrent: true
     builders:
       - gerrit-git-prep
@@ -25,7 +25,7 @@
 
 - job-template:
     name: 'gate-sahara-integration-{plugin}'
-    defaults:
+    defaults: global
     concurrent: true
     builders:
       - gerrit-git-prep