[no jira] Tiny change to stacks to split logic into new protected method. Adds signature protected Stacks getStacksFromFile(File f) throws IOException
JBIDE-17198 - add support for extracting tar and tar.gz files

Moved tar content to .xpl package
JBIDE-17148 and JBIDE-17179 - outdated test case updated
JBIDE-17215 - better handling of tar.gz extracting