refactor 4+6 to use alt image with ipv6 support

Change-Id: I1134568473abca0c47e88766450d74c81dd63981
refactor 4+6 to use alt image with ipv6 support after review

Change-Id: I14eab909445446ed36e1109d20f4ee669b8502ac
remove basic ipv6 tests inherited from basic ipv4, since won't work due to attempt to assign  floating ipv4 to private ipv6

Change-Id: I91fa47e4fe3cadd41f5f989bb172960ae0dbfbdb
Merge pull request #32 from kshileev/test

refactor 4+6 to use alt image with ipv6 support
Merge pull request #33 from kshileev/remove-basic-ipv6

remove basic ipv6 tests inherited from basic ipv4, since won't work due ...
Additional IPv6 tests

Add router interfaces
Add port delete check
Merge pull request #34 from sshnaidm/ipv61

Additional IPv6 tests
Merge from upstream 30.09.2014
Fix tempest bug of router find
Merge pull request #35 from sshnaidm/newipv6

Fix tempest bug of router find
Fix errors from merge
Restore scenario ipv6 framework

Change-Id: I980be80b0b55e0e2ae87756414e48f1406fa6a14
Merge pull request #36 from kshileev/restore-after-merge

Restore scenario ipv6 framework