Tweak error message to show actual file name

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1567741 13f79535-47bb-0310-9956-ffa450edef68
Fix a secondary issue identified in https://issues.apache.org/bugzilla/show_bug.cgi?id=56079
Install the service with a single call to the .exe rather than three calls.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1567742 13f79535-47bb-0310-9956-ffa450edef68