Fix parameters permission conditional

[ericholguin]

This PR just simplifies the conditional used to check if roles and permissions are enabled.

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Which Traffic Control components are affected by this PR?

• Traffic Ops

What is the best way to verify this PR?

Run TO and make sure a user can view a secure parameter value with the right permissions

PR submission checklist

• This PR has tests
• This PR has documentation
• This PR has a CHANGELOG.md entry
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 32.34%. Comparing base (75ec56f) to head (992a6fc).
⚠️ Report is 369 commits behind head on master.

Files with missing lines	Patch %	Lines
...fic_ops/traffic_ops_golang/parameter/parameters.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #7739       +/-   ##
=============================================
- Coverage     65.05%   32.34%   -32.72%     
  Complexity       98       98               
=============================================
  Files           314      710      +396     
  Lines         12365    79773    +67408     
  Branches        907      965       +58     
=============================================
+ Hits           8044    25799    +17755     
- Misses         3968    51828    +47860     
- Partials        353     2146     +1793     

Flag	Coverage Δ
golib_unit	52.63% <ø> (?)
grove_unit	12.02% <ø> (?)
t3c_unit	5.99% <ø> (?)
traffic_monitor_unit	26.33% <ø> (?)
traffic_ops_integration	∅ <ø> (∅)
traffic_ops_unit	22.44% <0.00%> (?)
traffic_portal_v2	70.84% <ø> (∅)
traffic_stats_unit	10.76% <ø> (?)
unit_tests	27.60% <0.00%> (∅)
v3	∅ <ø> (∅)
v4	∅ <ø> (∅)
v5	∅ <ø> (∅)

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