Support the ability to ignore directories for ansible-lint job

For automation-tools repo, skip comac and comac-in-a-box directories

Change-Id: I1ea1e7b8ee84cd60f10962c67c6496a4912e7cd2
diff --git a/jjb/lint.yaml b/jjb/lint.yaml
index 70795d7..67059af 100644
--- a/jjb/lint.yaml
+++ b/jjb/lint.yaml
@@ -83,6 +83,9 @@
     concurrent: true
 
     builders:
+      - inject:
+          properties-content: |
+            SKIP_DIRS={skip-dirs}
       - shell: !include-raw-escape: shell/ansiblelint.sh