[FAB-18329] Fix data race in cluster/comm_test#TestRenewCertificates #2089
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This commit fixes a data race in orderer/common/cluster/comm_test.go#TestRenewCertificates.
The race occurred because the TLS configuration was updated from the test goroutine,
while a gRPC connection was being established from another goroutine, and as a result,
the TLS configuration was loaded without memory synchronization with the first goroutine.
I made the test close the gRPC connections before reconfiguring the communication layer.
Change-Id: I82b9cc685e9160e480ce77ec7e0a233b106eb0e5
Signed-off-by: Yacov Manevich yacovm@il.ibm.com