(#12094) Replace chained .with_* with a hash

(#12094) Replace chained .with_* with a hash

The hash passing to the with method is cleaner and closer to puppet code, so
all of the with_$param have been replaced with with($hash). This also
includes two minor whitspace changes to unstable.pp and source.pp.
This also replaces the ternary switch on param_set with a hash merge,
which is cleaner and will support more use cases.