Add establish connection to the alias hijacking.

[abMatGit]

This fixes #426
Kudos to @camertron! \o/

Proposed solution:

Alias the establish_connection method to explicitly and return an establish_connection_without_octopus connection.

This will cause establish_connection configuration_without_database to return a MySQL2::Adapter class instead of a Octopus::Proxy class, from which we can successfully call connection.create_database and bypass Octopus::Proxy#method_missing

[thiagopradi]

hey @abMatGit - could you check why the test suite is failing? Thanks

[mckinnsb]

It seems like the tests are failing because he replaced octopus_establish_connection with establish_connection. Wondering if this will work if establish_connection is just aliased to octopus_establish_connection.

[mckinnsb]

It doesn't - I think this will require a more significant patch.