BUCK GUI: Excluded generated javascript files from genrule
Removed the NPM Lock file that generated.

Change-Id: Ia2d16f28a3a11056f8eaed2805684020b9d2c4eb
diff --git a/web/gui/onos-gui-build b/web/gui/onos-gui-build
index 98b5623..b0bb79f 100755
--- a/web/gui/onos-gui-build
+++ b/web/gui/onos-gui-build
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 
 ONOS_INSTALL_LOCATION=$2
 echo ${ONOS_INSTALL_LOCATION}
@@ -8,9 +9,13 @@
 
 cd $ONOS_ROOT/tools/gui
 
+# Ensure lock file is removed
+rm -f package-lock.json
+
 # Install Project Dependencies
 echo "Installing project dependencies"
 npm install --loglevel=error
+rm -f package-lock.json
 
 # Build the GUI Project
 echo "Packaging JavaScript and CSS"