add back minimal test suite in lalapps/src/pulsar

@karl-wette as mentioned in #588 (closed), we really should still have a small test suite for the lalapps wrappers to lalpulsar executables. Sorry that I didn't think of this at the time of !1904 (merged).

The easiest and least time-wasting option would probably be to have a single test script that loops over all executable names and just tries lalapps_exe --version. (or --help, not sure if either or both are 100% supported by all codes). This could either be hardcoded for once (since the list will never expand) or maybe auto-generated by the Makefile.