Small fix for the "org.apache.karaf.service.guard.roles" property values.

The "org.apache.karaf.service.guard.roles" service property is set by the OSGi Service Guard to indicate what roles can possibly invoke this service. 
Previously it was not propertly handling roles that were defined as follows:
  method[/regexp/] = role1
This commit fixes that and adds a test for it.


git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546012 13f79535-47bb-0310-9956-ffa450edef68