Add basic codenarc checks

* Use gradle to run codenarc tests
* Point jcenter repo address to MCP Artifactory instance
* Add gradle cache and codenarc build report directories to .gitignore

Change-Id: Id5d23de2d6fde8fd4a583b3b67866e1906de8866
diff --git a/codenarcRules.groovy b/codenarcRules.groovy
new file mode 100644
index 0000000..17e8dac
--- /dev/null
+++ b/codenarcRules.groovy
@@ -0,0 +1,7 @@
+// File: codenarcRules.groovy
+
+ruleset {
+  ruleset('rulesets/basic.xml')
+  ruleset('rulesets/braces.xml')
+  ruleset('rulesets/imports.xml')
+}