Adds script with all the colors and decorators like bold, underline.
Uses this script in main osbash.sh script to bring color to the script
run.
Also adds -c option to enable colors while buiding osbash script.
Usage: ./osbash.sh -b cluster (colors enabled by default)
./osbash.sh -b --no-color cluster (colors disabled)
Implements: blueprint osbash-color-support
Change-Id: I5b17221f67f76552deb3498b8a020f1b0d3a64a8
845d2ae468