[FAB-17492] Modify the test function name of the function ConcatenateBytes
[FAB-17492] Modify the test function name of the function ConcatenateBytes

Description

Modify the function TestMetadataSignatureBytesNormal to
TestConcatenateBytesNormal and TestMetadataSignatureBytesNil to
TestConcatenateBytesNil. After modification, the meaning of the test
function is more clear.

Related issues

https://jira.hyperledger.org/browse/FAB-17492

Signed-off-by: xu wu <c60e4b27187b49b5b8fbf6cee83a4ace6d9aabce@163.com>

manish-sethi/fabric-sidedb,muralisrini/fabric,muralisrini/fabric,stemlending/fabric,manish-sethi/fabric-sidedb,hyperledger/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,stemlending/fabric,manish-sethi/fabric-sidedb,manish-sethi/fabric,hyperledger/fabric,stemlending/fabric,muralisrini/fabric,manish-sethi/fabric-sidedb,jimthematrix/fabric