Ensure test uses float value

[theunrepentantgeek]

What this PR does / why we need it:

Our CI builds have been failing because one of our lint tools has identified a problem in one of the tests for PropertyBag. This PR fixes the problem.

How does this PR make you feel:

If applicable:

• this PR contains tests

[codecov-commenter]

Codecov Report

Merging #1617 (4debf24) into master (0338b8d) will increase coverage by 0.72%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master    #1617      +/-   ##
==========================================
+ Coverage   62.17%   62.89%   +0.72%     
==========================================
  Files         163      187      +24     
  Lines       10739    12355    +1616     
==========================================
+ Hits         6677     7771    +1094     
- Misses       3422     3899     +477     
- Partials      640      685      +45     

Impacted Files	Coverage Δ
hack/generated/controllers/generic_controller.go	70.45% <0.00%> (ø)
hack/generated/main.go	0.00% <ø> (ø)
hack/generated/pkg/armclient/raw_client.go	56.52% <ø> (-2.61%)	⬇️
hack/generated/pkg/armclient/types.go	78.02% <ø> (+4.15%)	⬆️
hack/generated/pkg/genruntime/base_types.go	96.55% <ø> (ø)
hack/generated/pkg/genruntime/errors.go	40.90% <ø> (-36.37%)	⬇️
hack/generated/pkg/genruntime/property_bag.go	80.00% <ø> (ø)
...ck/generated/pkg/genruntime/resolved_references.go	50.00% <ø> (ø)
...ack/generated/pkg/genruntime/resource_reference.go	78.57% <ø> (+28.57%)	⬆️
...ted/pkg/reconcilers/azure_deployment_reconciler.go	66.58% <ø> (+8.36%)	⬆️
... and 222 more

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