This commit fixes the following possible failure:

panic: listen tcp 127.0.0.1:7050: bind: address already in use [recovered]
panic: listen tcp 127.0.0.1:7050: bind: address already in use

goroutine 167 [running]:
panic(0x95a0c0, 0xc4203993b0)
/opt/go/src/runtime/panic.go:500 +0x1a1
testing.tRunner.func1(0xc420097200)
/opt/go/src/testing/testing.go:579 +0x25d
panic(0x95a0c0, 0xc4203993b0)
/opt/go/src/runtime/panic.go:458 +0x243
github.com/hyperledger/fabric/peer/channel.newOrderer
/opt/gopath/src/github.com/hyperledger/fabric/peer/channel/create_test.go:53
github.com/hyperledger/fabric/peer/channel.TestCreateChainWithTimeoutErr
/opt/gopath/src/github.com/hyperledger/fabric/peer/channel/create_test.go:258
testing.tRunner(0xc420097200, 0xa3cf48)
/opt/go/src/testing/testing.go:610 +0x81
created by testing.(*T).Run
/opt/go/src/testing/testing.go:646 +0x2ec
FAIL github.com/hyperledger/fabric/peer/channel 3.168s
error: exit status 1
panic: EOF

I think this happens because the client doesn't close the connection
and the server port remains in TIME_WAIT and since we have 2 tests that bind
to the same port, the one that runs the 2nd time - fails.

The easiest way to solve this is simply by changing the port numbers
that are used in the test, but I simply added a connection close
to the getGenesisBlock method.

Change-Id: Ia08c3d8d10a8e01cf96ea2789b4d236921b850b5
Signed-off-by: Yacov Manevich <yacovm@il.ibm.com>