Removed legacy GUI.
FIxed an NPE in the devices table.
Added cord-gui to obs.exclude

Change-Id: I18a53d2c44c6c97fb7f5d16b7446942a1a37ddca
diff --git a/tools/dev/bin/onos-build-selective.exclude b/tools/dev/bin/onos-build-selective.exclude
index ace399a..494a438 100644
--- a/tools/dev/bin/onos-build-selective.exclude
+++ b/tools/dev/bin/onos-build-selective.exclude
@@ -3,3 +3,4 @@
 .*/build/conf/.*
 .*/docs/.*
 .*/openflow/drivers/.*
+.*/cord-gui/.*
\ No newline at end of file