Update to version 1.5.2
Fix check for release environment
Update readme
Fix use of app version for jetty-server dependency
Fix config file location in profile for packages

The rundeck-config.properties was loading from classpath reference
requiring the java classpath to contain "/etc/rundeck". The class-
path was changed in 1.5.1 which broke resolution of the config file.

* fixed incorrect config file location system prop in profile
* fixed incorrect rdeck.base system prop in profile

for issue #385
Update version to 1.5.2-1-GA
Release notes for 1.5.2