Fix numNodes property in gradle

[dbbaughe]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #393 (dfd1665) into master (8d5b917) will decrease coverage by 0.10%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #393      +/-   ##
============================================
- Coverage     76.63%   76.52%   -0.11%     
- Complexity     1454     1461       +7     
============================================
  Files           188      188              
  Lines          7335     7335              
  Branches       1190     1190              
============================================
- Hits           5621     5613       -8     
- Misses         1066     1077      +11     
+ Partials        648      645       -3     

Impacted Files	Coverage Δ	Complexity Δ
...statemanagement/model/destination/CustomWebhook.kt	65.21% <0.00%> (-28.99%)	12.00% <0.00%> (-2.00%)
...asticsearch/indexmanagement/rollup/model/Rollup.kt	89.69% <0.00%> (+0.51%)	54.00% <0.00%> (+1.00%)
...anagement/indexstatemanagement/model/Transition.kt	64.61% <0.00%> (+1.53%)	5.00% <0.00%> (ø%)
...rch/indexmanagement/rollup/model/RollupMetadata.kt	85.11% <0.00%> (+1.78%)	19.00% <0.00%> (+3.00%)
...icsearch/indexmanagement/rollup/model/ISMRollup.kt	94.44% <0.00%> (+1.85%)	29.00% <0.00%> (+2.00%)
...ent/rollup/action/explain/ExplainRollupResponse.kt	85.00% <0.00%> (+10.00%)	7.00% <0.00%> (+1.00%)
...nt/indexstatemanagement/model/destination/Slack.kt	54.54% <0.00%> (+13.63%)	4.00% <0.00%> (+2.00%)

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