Automatically parse YAQL-expressions during YAML parsing

Use matcher from yaql_expression module, thus making YAQL expressions
to be automatically detected and parsed during YAML parsing. This
allows to throw away several helper functions.

Also drop obsolete 'attributeNames' attribute handling.

The sample of new Dynamic UI version can be found at
http://paste.openstack.org/show/75428/

This commit should be reviewed in pair with
https://review.openstack.org/#/c/86376/

Change-Id: I08422a4c6a3e0dff4ad704d209cc27621c2a3c76