ENH: foamRunTutorials: Enable Alltest files to be read as well as Allrun

foamRunTutorials now accepts two arguments:
-test : Preferentially execute Alltest, if present, over Allrun.
-skipFirst : Skip Alltest/Allrun at the top level to prevent recursion

Added because some tutorials are not dependent on controlDict and take
a long time.

tutorials/mesh/cvMesh/blob/Alltest

@@ -0,0 +1,18 @@
+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial run functions
+. $WM_PROJECT_DIR/bin/tools/RunFunctions
+
+runApplication cvMesh
+
+# Change collapseEdges to only do one iteration
+cp system/collapseDict system/collapseDict.org
+
+sed -e s/"\(maximumIterations[ \t]*\)\([0-9]*\);"/"\1 1;"/g \
+system/collapseDict.org > system/collapseDict
+
+runApplication collapseEdges -latestTime -collapseFaces
+
+
+# ----------------------------------------------------------------- end-of-file