Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54712
Code clean-up. Use Locale.ENGLISH consistently for upper/lower case conversions.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1457452 13f79535-47bb-0310-9956-ffa450edef68
Change the name of the working directory for the ROOT application (located under $CATALINA_BASE/work by default) from _ to ROOT.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1457454 13f79535-47bb-0310-9956-ffa450edef68