changed Java 7 requirement to Java 8 in deploy doc
changed Java 7 requirement to Java 8 in deploy doc

Added some improvements to the deployment docs

Teradata/kylo,Teradata/kylo,rashidaligee/kylo,Teradata/kylo,claudiu-stanciu/kylo,rashidaligee/kylo,peter-gergely-horvath/kylo,claudiu-stanciu/kylo,claudiu-stanciu/kylo,peter-gergely-horvath/kylo,rashidaligee/kylo,peter-gergely-horvath/kylo,rashidaligee/kylo,peter-gergely-horvath/kylo,Teradata/kylo,claudiu-stanciu/kylo,claudiu-stanciu/kylo,Teradata/kylo