Revert to /etc/cassandra-reaper

[jeffbanks]

Adjustment to revert changes made in cassandra-reaper PR#1113 to support this k8ssandra PR in k8ssandra for mount path changes.

Moving change of /etc/reaper to /etc/cassandra-reaper to reduce complexity of those deploying Reaper outside of a container.

[codecov]

Codecov Report

Merging #1139 (3967c73) into master (923f02e) will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1139      +/-   ##
==========================================
+ Coverage   80.26%   80.34%   +0.07%     
==========================================
  Files         109      109              
  Lines        8910     8910              
  Branches      924      924              
==========================================
+ Hits         7152     7159       +7     
+ Misses       1238     1230       -8     
- Partials      520      521       +1     

Impacted Files	Coverage Δ
.../java/io/cassandrareaper/service/RepairRunner.java	83.72% <0.00%> (-0.52%)	⬇️
...java/io/cassandrareaper/service/SegmentRunner.java	83.14% <0.00%> (-0.47%)	⬇️
...java/io/cassandrareaper/service/RepairManager.java	78.57% <0.00%> (-0.45%)	⬇️
...assandrareaper/ReaperApplicationConfiguration.java	71.27% <0.00%> (ø)
...a/io/cassandrareaper/storage/CassandraStorage.java	86.11% <0.00%> (+0.17%)	⬆️
...o/cassandrareaper/resources/RepairRunResource.java	73.27% <0.00%> (+0.60%)	⬆️
...rc/main/java/io/cassandrareaper/service/Heart.java	85.00% <0.00%> (+0.71%)	⬆️
...ain/java/io/cassandrareaper/jmx/ClusterFacade.java	83.87% <0.00%> (+1.43%)	⬆️
...io/cassandrareaper/jmx/HostConnectionCounters.java	82.35% <0.00%> (+2.94%)	⬆️
...eaper/resources/DiagEventSubscriptionResource.java	84.61% <0.00%> (+3.84%)	⬆️