Putting the test code in the same package makes it easier for forks
since they don't have to change the import paths as much and it also
gets rid of the need for internal_test.go to bridge.
While here, remove the reorganization test since it is much better
handled by the full block tests and is no longer needed and do some
light cleanup on a few other tests.
The full block tests had to remain in the separate test package since it
is a circular dependency otherwise. This did require duplicating some
of the chain setup code, but given the other benefits this is
acceptable.
This commit contains the entire btcchain repository along with several
changes needed to move all of the files into the blockchain directory in
order to prepare it for merging. This does NOT update btcd or any of the
other packages to use the new location as that will be done separately.
- All import paths in the old btcchain test files have been changed to
the new location
- All references to btcchain as the package name have been changed to
blockchain
