Transpose retrieval of now time to get a more accurate time

[asprouse5]

Moved the retrieval of the "now" time to later to get a more accurate time. When the line is earlier, the times can be just barely off. Example (Now is .000003 seconds before NotBefore):

NotBefore: 2020-06-01 17:50:52.703655 +0000 UTC Now: 2020-06-01 17:50:52.703652 +0000 UTC NotOnOrAfter: 2020-06-01 17:55:52.703655 +0000 UTC

[coveralls]

Pull Request Test Coverage Report for Build 67

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.1%) to 70.653%

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Files with Coverage Reduction	New Missed Lines	%
idp/artifact.go	2	71.72%
<!--	Total:	2		-->

Totals
Change from base Build 66:	-0.1%
Covered Lines:	1158
Relevant Lines:	1639

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💛 - Coveralls