Add validity checks to Quantum v2 resources

Add validity checks to Quantum v2 resources

Fixes bug 1015148

The code enable defining validity checks for input variables. This
is done via callback functions per type. The following types are supported:
    - type:values - checks that data is valid according to a list of values
    - type:mac_address - checks that data is a valid mac address
    - type:ip_address - checks that data is a valid ip address
    - type:subnet - checks that data is a valid cidr
    - type:regex - checks that data matches a regular expression (for
      example checking UUID validity)

Change-Id: Iaa694cbfe3c518a5cd3951271853fe986106e7f5