validate-files.py now also checks required attributes
of callback plugins. At this time, only two commonly used
attributes are checked, because not all of our plugins
correctly declare type and documentation.
Main loop of the script was adjusted to work with multiple
types of files to validate, and to minimize unnecessary checks.
Signed-off-by: Jiri Podivin <jpodivin@redhat.com>
Change-Id: I2c92b77f127a82afaf28a3dd5ebfb9e3614bbb07
f1ce73f1c8