Low: check_ipc: generate unique server names for tests
Low: check_ipc: generate unique server names for tests

Package builders that run multiple builds of libqb in parallel
will fail because the IPC unit tests stomp on each other's namespace.
We have to give each IPC server a randomized unique name during
'make check' to avoid this.

kgaillot/libqb,ClusterLabs/libqb,gao-yan/libqb,gao-yan/libqb,rubenk/libqb,ClusterLabs/libqb,ClusterLabs/libqb,kgaillot/libqb,rubenk/libqb,kgaillot/libqb