Allow updates to VERSION file in docs-only patchsets

Split XOS job-group between code and docs patches

Ignore *.ico web icon files

Change-Id: Idaec4f7da20af59c88cdc92f112e652a99a71195
diff --git a/jjb/defaults.yaml b/jjb/defaults.yaml
index f29f066..48d5878 100644
--- a/jjb/defaults.yaml
+++ b/jjb/defaults.yaml
@@ -82,7 +82,7 @@
     # for matching files with file-include-regexp
     all-files-regexp: '.*'
     doc-files-regexp: '^docs/.*'
-    not-doc-files-regexp: '^(?!docs).*'
+    code-files-regexp: '^(?!docs|VERSION).*' # allow docs-only patchsets w/version bumps to skip code-level tests
 
     # Jenkins SSH host doc publisher
     docs-ssh-host: 'guide.opencord.org'