STYLE: adjust tutorial Allrun scripts (issue #310)

- A few without a 'cd' at the start.
  Use $(getApplication) directly in more places (for clarity).

tutorials/combustion/fireFoam/LES/smallPoolFire3D/Allrun

@@ -1,11 +1,9 @@
 #!/bin/sh
+cd ${0%/*} || exit 1    # Run from this directory
 
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
-# Set application name
-application=$(getApplication)
-
 runApplication blockMesh
 runApplication topoSet
 runApplication createPatch -overwrite
@@ -13,8 +11,6 @@ runApplication createPatch -overwrite
 cp 0/ph_rgh.orig 0/ph_rgh
 
 runApplication decomposePar -force
-
-# Run
-runParallel $application
+runParallel $(getApplication)
 
 #------------------------------------------------------------------------------