Don't need rados-haskell now vaultaire-common has been split out

Signed-off-by: Sharif Olorin <sio@tesser.org>
Don't need vaultaire proper either, but do need -common and marquise

Signed-off-by: Sharif Olorin <sio@tesser.org>
Kill the 7.6 builds, they aren't relevant anymore

Signed-off-by: Sharif Olorin <sio@tesser.org>
ByteString version constraint might help?

Signed-off-by: Sharif Olorin <sio@tesser.org>