fix: host count for remediation

[swadeley]

Description

Fix test to filter on system created for the test.

How to test the PR

'Check actions, systems, and execution history tabs' test passes.

Before the change

'Check actions, systems, and execution history tabs' test fails because many other systems from other tests are present in the table.

After the change

'Check actions, systems, and execution history tabs' test passes.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.53%. Comparing base (cedc0ca) to head (eef7060).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1503   +/-   ##
=======================================
  Coverage   62.53%   62.53%           
=======================================
  Files         127      127           
  Lines        3310     3310           
  Branches      892      899    +7     
=======================================
  Hits         2070     2070           
  Misses       1120     1120           
  Partials      120      120           

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[swadeley]

I will create new PR from my fork:

#1505