Move jsonification to given

[Kudbettin]

Addresses #307, but does not fix it completely.

One of the issue's problems is that the stash contains "to be jsonified" contents. When it has does not alter the contents of the resources in stash and ends up passing a badly formatted stash. The problem doesn't occur with When it contains because it drills down to the jsonified value.

This is an aggressive solution to a simple problem. The other option I came up with was jsonifying the entities in the stash during WHEN. However, altering contents of the resources during WHEN seemed to be an exception against "WHEN filters"

Since everything will already be jsonified, jsonify calls on step functions can be removed as well.

[coveralls]

Pull Request Test Coverage Report for Build 1077

• 14 of 20 (70.0%) changed or added relevant lines in 2 files are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.5%) to 59.666%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
terraform_compliance/common/helper.py	10	11	90.91%
terraform_compliance/steps/given/i_have_name_section_configured.py	4	9	44.44%

Files with Coverage Reduction	New Missed Lines	%
terraform_compliance/common/defaults.py	6	83.78%

Totals
Change from base Build 1070:	0.5%
Covered Lines:	1216
Relevant Lines:	2038

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💛 - Coveralls