Increment Magic Button Release Version

Changed default scheduler to Capacity as fair scheduler not working properly with latest build. Also inserted 120s timeout in CloudInit to ensure YUM repo has time to initialize - mitigates dependency failures in build due to java not installing.

Fixed MySQL logging parameter

Fixed raw path to my.cnf

Updated Magic Button Deployment Tag

Updated my.cnf

Modified my.cnf deployment

Updated Magic Button Deployment Tag

Re-added my.cnf configuration required for Cloudera bootstrapping

Incremented Magic Button Release Tag

Updated mysql initialization syntax

Updated Magic Button Tag

Updates to support MySQL 8 config & syntax

Incrementing Deployment release

Changed CM default version to 7.4.4 as the links to repo data for 7.5.1 are giving a 404 (https://archive.cloudera.com/cm7/7.5.1/redhat7/)