Improve build and travis tests

[lmcglohon]

Description

From Mark Triggs, improvements to dist builds (hudmol@00a201f)
Updated travis tests to not use Java 7 and created new matrix for running tests in less than 50 minutes - a travis limit

Related JIRA Ticket or GitHub Issue

Motivation and Context

Faster build times and improved travis testing

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.