Ignore SignalException Rubocop check

This convention doesn't seem necessary.

Change-Id: I443032acba887e4bd0856219af1be37b74c5d9eb
Reviewed-on: http://gerrit.causes.com/35999
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>

Author: Shane da Silva

.rubocop.yml

@@ -29,6 +29,9 @@ LineLength:
 MethodLength:
   Max: 20
 
+SignalException:
+  Enabled: false
+
 TrailingComma:
   Enabled: false