Update test Hazelcast server version to 5.7.0 in start-rc scripts#1448

ihsandemir wants to merge 3 commits into

hazelcast:masterhazelcast/hazelcast-cpp-client:masterfrom

ihsandemir:update_test_server_versionihsandemir/hazelcast-cpp-client:update_test_server_versionCopy head branch name to clipboard