JMSSampler: For input string: "" java.lang.NumberFormatException (for Expiration or Priority fields)
- fix the bug
- simplify some code arround getPropertyAsString() vs Constant fields for Priority and Expiration
- add documentation for these fields in User Manual (JMS Publisher and JMS Point-to-Point)
- update screenshots
- add time unit in the GUI for expiration field and indicate the range 0-9 for priority level too.
Bugzilla Id: 57183

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1636619 13f79535-47bb-0310-9956-ffa450edef68
Update screenshots in changes for next version 2.12
Bugzilla Id: 57183

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1636625 13f79535-47bb-0310-9956-ffa450edef68