Migrate to jira-ruby and enable issue updates

Migrate the connection from the old soap services library to the newer sumoheavy/jira-ruby gem, to take advantage of the new Rest Service API v2 (available in Jira 5 and above).  The old library is no longer compatible with the latest version of Jira, so this corrects that problem.

Additionally enable the ability to create and update tickets in the jira system.

Given the major change here, I've also bumped the version from 0.3.x to 0.4.0