stacktrace.log location should be configurable

[gschueler]

instead of defaulting to the current working dir of the JVM process on startup. This affects Tomcat deployment.

potential fix for Config.groovy:

       if(!System.properties['rundeck.grails.stacktrace.enabled']) {
  String logDir = System.properties['rundeck.grails.stacktrace.dir']
  rollingFile name: 'stacktrace',
              maximumFileSize: 10 * 1024 * 1024,
              file: '$logDir/stacktrace.log',
              layout: pattern(
                  conversionPattern: ''%d [%t] %-5p %c{2} %x - %m%n''),
              maxBackupIndex: 10
} else {
    null name:'stacktrace'
} 

[gschueler]

• require system property -Drundeck.grails.stacktrace.enabled=true to enable stacktrace logging
• require system property -D rundeck.grails.stacktrace.dir=/path to determine destination for stacktrace.log file