contractcourt: speed up TestChainWatcherDataLossProtect by ditching quickcheck
contractcourt: speed up TestChainWatcherDataLossProtect by ditching quickcheck

In this commit, we speed up the `TestChainWatcherDataLossProtect`
_considerably_ by enumerating relevant tests using table driven tests
rather than generating random tests via the `testing/quick` package.
Each of these test cases are also run in parallel bringing down the
execution time of this test from a few minutes, to a few seconds.

aakselrod/lnd,LightningNetwork/lnd,LightningNetwork/lnd,aakselrod/lnd