Move network_utils to lib/ to facilitate testing

Signed-off-by: John Else <john.else@citrix.com>
Replace broken network_test with the unit tests from xen-api

Signed-off-by: John Else <john.else@citrix.com>
Unlink network tests from xapi code

Signed-off-by: John Else <john.else@citrix.com>
Copyright notices

Signed-off-by: John Else <john.else@citrix.com>
Rename lacp test suite

Signed-off-by: John Else <john.else@citrix.com>
Build network test, and add "make test" target

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #2 from johnelse/new-tests

Replace network_test with unit tests from xen-api