Test issues

[forslund]

• Clear the context after test is done
• Modify the regex (worked in https://jenkins.mycroft.team/job/18.08-skill-tester/48/console)

The Adapt regex handling is a bit inconsistent for speed.

An alternative here may be to add the options 0-100% programattically to the Percent keyword:

in initialize:

        # Register 0-100%
        for p in range(101):
            self.register_vocabulary('{}%'.format(p), 'Percent')