Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55297
Look in CATALINA_HOME for jsvc if it isn't specified and isn't found in CATALINA_BASE

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1507098 13f79535-47bb-0310-9956-ffa450edef68