testsuite: Add a common test configuration. Fix configure.ac and Makefile.am errors.

- Add a top level test configuration file for test states that are common
  to all BSPs. This saves adding a test configuration (tcfg) file for
  every BSP.

- Add the test states 'user-input' and 'benchmark'. This
  lets 'rtems-test' stop the test rather than waiting for a timeout or
  letting a benchmark run without the user asking for it to run.

- Implement rtems-test-check in Python to make it faster. The shell script
  had grown to a point it was noticably slowing the build down.

- Fix the configure.ac and Makefile.am files for a number of the
  test directories. The files are difficiult to keep in sync with the
  number of tests and mistakes can happen such as tests being left
  out of the build. The test fsrofs01 is an example. Also a there was
  a mix of SUBDIRS and _SUBDIRS being used and only _SUBDIRS should be
  used.

- Fix the test fsrofs01 so it compiles.

Closes #2963.

testsuites/benchmarks/Makefile.am

@@ -1,9 +1,9 @@
 ACLOCAL_AMFLAGS = -I ../aclocal
 
-SUBDIRS =
-SUBDIRS += linpack
-SUBDIRS += whetstone
-SUBDIRS += dhrystone
+_SUBDIRS =
+_SUBDIRS += dhrystone
+_SUBDIRS += linpack
+_SUBDIRS += whetstone
 
 include $(top_srcdir)/../automake/subdirs.am
 include $(top_srcdir)/../automake/local.am

testsuites/benchmarks/configure.ac

@@ -22,8 +22,8 @@ RTEMS_CHECK_CUSTOM_BSP(RTEMS_BSP)
 
 # Explicitly list all Makefiles here
 AC_CONFIG_FILES([Makefile
+dhrystone/Makefile
 linpack/Makefile
 whetstone/Makefile
-dhrystone/Makefile
 ])
 AC_OUTPUT