[FAB-3518] Fix fabric-ca-server build failure
[FAB-3518] Fix fabric-ca-server build failure

See [FAB-3518]

This fixes a compile failure for fabric-ca-server.
TODO: Investigate why CI didn't catch this.  I'm stumped currently.

Change-Id: I7d29bc8ed358ab7da55f86caaa816fb8ab822cc2
Signed-off-by: Keith Smith <0f8efcf9aed721c212c631c567e094685b5cc962@us.ibm.com>

saadk10/fabric-ca,saadk10/fabric-ca