Closes #430 by adapting Jira integration to the modified RestUtils that throw RestException subclasses.

Conflicts:
	threadfix-entities/src/main/java/com/denimgroup/threadfix/CollectionUtils.java
Fixes Jira unit test by throwing RestIOException with 401 error if the restricted field is present.
Merge commit 'd27da29305096b3fe81deb11167dee1881f0741f' into HEAD