private InstallViewMessage getInstallViewMessage(GMSMembershipView view, Object credentials,
      boolean preparing) {
    InstallViewMessage installViewMessage = new InstallViewMessage(view, credentials, preparing);
    installViewMessage.setSender(gmsJoinLeaveMemberId);
    return installViewMessage;
  }
Given a view with [A, B, C, D] where C is coordinator, a failed availability check on A
and a pending join request from E show that B becomes coordinator when C sends it a
Leave request and that E is allowed into the system and retains its view ID.
See GEODE-6570
geode-membership/src/integrationTest/java/org/apache/geode/distributed/internal/membership/gms/membership/GMSJoinLeaveJUnitTest.java