Deviation parser and data model

Change-Id: I3cb3da5748057d0c2c9c99d7c3495643bc1ea243
diff --git a/compiler/base/parser/src/test/resources/ValidDeviationNotSupported.yang b/compiler/base/parser/src/test/resources/ValidDeviationNotSupported.yang
new file mode 100644
index 0000000..979f29f
--- /dev/null
+++ b/compiler/base/parser/src/test/resources/ValidDeviationNotSupported.yang
@@ -0,0 +1,10 @@
+module Test {
+    yang-version 1;
+    namespace urn:ietf:params:xml:ns:yang:ietf-ospf;
+    prefix On;
+    deviation /base:system/base:daytime {
+        description "desc";
+        reference "ref";
+        deviate not-supported;
+    }
+}