fixes #3577 - do not treat `params[:dryrun]` with value `false` as true

Fixes #3182 - Make IP optional in some circumstances

fixes #2951 - Host API documentation lacks compute_resource_id

fixes #3205 - Extract and refactor report importing logic

This patch extracts all report importing logic into seperate importer and status classes.
long term this could allow:

1. aliases methods for async operations
2. different types of reports imports (based on reporting type).

fixes #1830 - auto assign puppet proxy if its not defined upon facts/reports event

[REFACTOR] fixes #2967 - refactored Fact Importer

Based on Dmitri Dolguikh <dmitri@appliedlogic.ca> original patch.

- renamed original fact_importer class to fact_parser class
- moved fact handling logic to its own fact_importer class
- fact importer now assumes single-value facts...

fixes #3364 Add option to disable automatc host creation when a report is received

fixes #3140 - API to allow importing of puppet classes

Fixes #3293 add FactoryGirl to tests

fixes #3239 - pxelinux spoofing on postgres now works