Added new OSTF tests for Murano 0.4

Added OSTF tests for new Murano services:
 Demo Service (simple service based on CentOS image)
 Apache Service (Linux-based service)
 Telnet Service (Linux-based service)

Also fixed logic for image search to support different
Murano images types.

Fixed issue with changed windows images tag.

Change-Id: Ief56732f450f6ed14f47b70e82e04957a7770c17
Implements: blueprint new-ostf-tests-for-murano04