[btcsuite/btcd] d406d9: wire: Consolidate tests into the wire pkg. (#728)

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: d406d9e52b92a5ad9d7b325d024b543135968b8a
      
https://github.com/btcsuite/btcd/commit/d406d9e52b92a5ad9d7b325d024b543135968b8a
  Author: Dave Collins <d...@davec.name>
  Date:   2016-08-08 (Mon, 08 Aug 2016)

  Changed paths:
    M wire/bench_test.go
    M wire/blockheader_test.go
    M wire/common_test.go
    M wire/fakeconn_test.go
    M wire/fakemessage_test.go
    M wire/fixedIO_test.go
    R wire/internal_test.go
    M wire/invvect_test.go
    M wire/message_test.go
    M wire/msgaddr_test.go
    M wire/msgalert_test.go
    M wire/msgblock_test.go
    M wire/msgfilteradd_test.go
    M wire/msgfilterclear_test.go
    M wire/msgfilterload_test.go
    M wire/msggetaddr_test.go
    M wire/msggetblocks_test.go
    M wire/msggetdata_test.go
    M wire/msggetheaders_test.go
    M wire/msgheaders_test.go
    M wire/msginv_test.go
    M wire/msgmempool_test.go
    M wire/msgmerkleblock_test.go
    M wire/msgnotfound_test.go
    M wire/msgping_test.go
    M wire/msgpong_test.go
    M wire/msgreject_test.go
    M wire/msgsendheaders_test.go
    M wire/msgtx_test.go
    M wire/msgverack_test.go
    M wire/msgversion_test.go
    M wire/netaddress_test.go
    M wire/protocol_test.go
    M wire/shahash_test.go

  Log Message:
  -----------
  wire: Consolidate tests into the wire pkg. (#728)

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.

This same thing should probably be done for the majority of the code
base.