cassandra_table: Fixes a couple of pylint issues

[rhysmeister]

SUMMARY

https://github.com/ansible-collections/community.cassandra/runs/7799765558?check_suite_focus=true

ISSUE TYPE

• Bugfix Pull Request

COMPONENT NAME

cassandra_table

[codecov[bot]]

Codecov Report

Merging #225 (55411f9) into master (25a7a0d) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #225   +/-   ##
=======================================
  Coverage   78.32%   78.32%           
=======================================
  Files          38       38           
  Lines        2694     2694           
  Branches      614      614           
=======================================
  Hits         2110     2110           
  Misses        297      297           
  Partials      287      287           

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