Bump CKAN apps to python 2.7.18

[adborden]

User Story

As a [user description], I want [behavior description] so that [goal].

[...or alternatively...]

In order to [goal], [stakeholder] wants [change].

Acceptance Criteria

[ACs should be clearly demoable/verifiable whenever possible. Try specifying them using BDD.]

• GIVEN [a contextual precondition]
  [AND optionally another precondition]
  WHEN [a triggering event] happens
  THEN [a verifiable outcome]
  [AND optionally another verifiable outcome]

Background

[Any helpful contextual notes or links to artifacts/evidence, if needed]

Security Considerations (required)

[Any security concerns that might be implicated in the change. "None" is OK, just be explicit here!]

Sketch

[Notes or a checklist reflecting our understanding of the selected approach]

[mogul]

Still applies to the FCS environment; cloud.gov has the latest Python 2.7 version available. We expect to address by moving to Python3.

[nickumia-reisys]

• Validating CKAN2.9 & Python3 framework with catalog #3401 (comment)
• Stay on a supported version of Python 3 #3876