DOCS-1615: limit metrics terminology fix (#912)
DOCS-1615: limit metrics terminology fix (#912)

* DOCS-1615: Adds reporting metrics for limits

This commit adds descriptions for metrics that measure how
the organization is using resources that have organization-level
limits.

* DOCS-1615: Add metrics for org limits to docs

* DOCS-1615: Fixes in response to reviewer comments

* DOCS-1615: More fixes based on review comments

* DOCS-1615: Added modifier

* DOCS-1615: Updates based on Z's comments

* DOCS-1615: Fix problems in moving to product-docs

* DOCS-1615: Fixes link problem

* DOCS-1615: Fixed contract, Docker mistakes
signalfx/integrations,signalfx/integrations