Temporary remove old tests and regtests of v0.0.8

Two reasons: duplicate of existing unit test and no longer compatible
due to the renaming of bitcoind -> mastercored.

I'm very much in favor of adopting the missing parts though, but I
believe it's cleaner to remove this until the tests are converted.
Merge pull request #212 from dexX7/mcore-revert-v008-tests

Temporary remove old tests and regtests of v0.0.8