Roll version to recreate release artifacts

Roll versions to 0.5.1 - need to re-release El Alto early release

Change-Id: Id56175e77fe52596059aa072b8a64c35c1ccba06
Issue-ID: CCSDK-1563
Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>
diff --git a/.gitignore b/.gitignore
index 6a9d982..9244b48 100755
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,7 @@
 target-ide
 MANIFEST.MF
 **/yang-gen-sal
+sli/model/src/main/java
 
 ## Misc Ignores (OS specific etc) ##
 bin/