4384 promote el7

[donsizemore]

New Contributors

Updates Vagrantfile, scripts/vagrant/setup.sh (EL7 doesn't install unzip by default) and Pre-Reqs page to prefer EL7 platform. conf/docker/* already uses 7.2

Related Issues

• connects to promote EL7 as the recommended platform  #4384

Pull Request Checklist

• Unit tests completed
• Integration tests: None
• Deployment requirements, SQL updates, Solr updates, etc.: None
• Documentation completed
• Merged latest from "develop" branch and resolved conflicts

[coveralls]

Coverage remained the same at 12.842% when pulling f00fc2f on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling 2485e76 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling f20b173 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling ac496b1 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling ac496b1 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling 98ad217 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling 98ad217 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling e91a10d on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[coveralls]

Coverage increased (+0.004%) to 12.846% when pulling 0d7b226 on donsizemore:4384-promote-EL7 into 80e75b6 on IQSS:develop.

[pdurbin]

Looks good.