Hackdna/puppet params

[hackdna]

Toward #3052, #822 and #2743:

• centralize Refinery Puppet module configuration in class refinery::params
• parametrize all Refinery Puppet module classes to avoid use of globals
• consolidate vagrant.pp and aws.pp into site.pp manifest
• factor out Django and UI configuration into separate classes
• remove refinery::aws class
• simplify refinery::neo4j and refinery::solr classes

[codecov]

Codecov Report

Merging #3208 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #3208   +/-   ##
========================================
  Coverage    62.26%   62.26%           
========================================
  Files          439      439           
  Lines        27764    27764           
  Branches      1282     1282           
========================================
  Hits         17286    17286           
  Misses       10478    10478

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