Tomcat upgrade

See: Newer post about Tomcat upgrade to 5.5.28

As part of 7.6 upgrade, upgrade tomcat to 5.5.26 (before proceeding with DPM upgrade steps)

1. Copy the webapps from /opt/tomcat/webapps to 5.5.26 webapps folder
2. copy conf/Catalina/localhost config xml files to corresponding 5.5.26 folder
3. Copy config from server.xml from /opt/tomcat/conf to corresponding 5.5.26 folder
4. Copy workers.properties file
5. Change link to new tomcat