Merge branch 'release-1.3.18' into develop

* release-1.3.18:
  Bumping version to 1.3.18
  Update changelog with latest changes
removed tab chars from a topic, and removed a bad link from another
Updates to SES topics and some fixes for autoscaling and rds.
Update Changelog with latest bugfixes
Merge branch 'EronHennessey-doc_updates' into develop

* EronHennessey-doc_updates:
  removed tab chars from a topic, and removed a bad link from another
Merge branch 'EronHennessey-doc_updates_ses' into develop

* EronHennessey-doc_updates_ses:
  Updates to SES topics and some fixes for autoscaling and rds.
EMR: Bug fix in install-applications and create-cluster

1. Rename --apps to --applications in install-applications
2. Fixed bug in create-cluster --applications Name=MapR where Args is required.
EMR: Add unit tests for application
EMR: Update create-default-roles and Add --service-role & --use-default-roles
Test failure fix
Update changelog with latest changes
Bumping version to 1.3.19
Merge branch 'release-1.3.19'

* release-1.3.19:
  Bumping version to 1.3.19
  Update changelog with latest changes
  Test failure fix
  EMR: Update create-default-roles and Add --service-role & --use-default-roles
  EMR: Add unit tests for application
  EMR: Bug fix in install-applications and create-cluster
  Update Changelog with latest bugfixes
  Updates to SES topics and some fixes for autoscaling and rds.
  removed tab chars from a topic, and removed a bad link from another