[Tachyon-235] : Improve tachyon-start.sh script to create/format the journal, data and work folder

Add support in tachyon-start.sh to format the Journal, UnderFS data and Workers folder on Master. A new parameter is introduced at the end.
Usage : Usage: tachyon-start.sh [-h] WHAT [MOPT] [-f]

Eg: ./bin/tachyon-start.sh all Mount -f
(or)
      ./bin/tachyon-start.sh all Mount

Tests performed: Tested the above command and verified that folders are created.

./bin/tachyon-start.sh all MOPT -f

Since this line is under "all" section : $1 is "all", $2 is "Mount"
and "-f" will be $3