cppunit: Read regex specified by user on command line.
cppunit: Read regex specified by user on command line.

If the compiler doesn't support C++11 <regex>, fall back on running
all tests.  The default regex (if the user does not pass --re on the
command line) is be 'All Tests'.  Passing e.g. "--re .*" will cause
the same test to be run multiple times and isn't recommended.

pbauman/libmesh,hrittich/libmesh,capitalaslash/libmesh,pbauman/libmesh,libMesh/libmesh,roystgnr/libmesh,dschwen/libmesh,libMesh/libmesh,90jrong/libmesh,BalticPinguin/libmesh,90jrong/libmesh,roystgnr/libmesh,libMesh/libmesh,capitalaslash/libmesh,BalticPinguin/libmesh,90jrong/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,dschwen/libmesh,libMesh/libmesh,jwpeterson/libmesh,hrittich/libmesh,hrittich/libmesh,hrittich/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,90jrong/libmesh,dschwen/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,pbauman/libmesh,hrittich/libmesh,roystgnr/libmesh,dschwen/libmesh,libMesh/libmesh,jwpeterson/libmesh,hrittich/libmesh,libMesh/libmesh,roystgnr/libmesh,BalticPinguin/libmesh,90jrong/libmesh,jwpeterson/libmesh,BalticPinguin/libmesh,pbauman/libmesh,capitalaslash/libmesh,pbauman/libmesh,hrittich/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,jwpeterson/libmesh,capitalaslash/libmesh,90jrong/libmesh,hrittich/libmesh,libMesh/libmesh,dschwen/libmesh,90jrong/libmesh,pbauman/libmesh,pbauman/libmesh,libMesh/libmesh,90jrong/libmesh,capitalaslash/libmesh,hrittich/libmesh,capitalaslash/libmesh,pbauman/libmesh,roystgnr/libmesh,90jrong/libmesh,roystgnr/libmesh,pbauman/libmesh,dschwen/libmesh,roystgnr/libmesh,dschwen/libmesh,BalticPinguin/libmesh,jwpeterson/libmesh,dschwen/libmesh