Adds tiny utility method to CcmBridge.

Adds a middleman between driver and all direct calls to InetAddress.
This is meant to help with testing in case there is a need to substitute
name resolution with resolution by specific ip address without modifying
system environment or providing custom DNS server.

Default implementation redirects all calls to InetAddress class which
should not introduce change in behaviour.
One introduced downside is that if the methods are to be customizable
then the interface cannot have them `static`.

Adds also implementation of MockResolver that has its own mapping of hostnames
to addresses.

Adds MockResolverIT.