Moving common-utils to 1.12.0.2

[saratvemulapalli]

Description of changes: Moving the common-utils library to 1.12.0.2 consume latest changes in the security plugin.
Refer to commit: opendistro-for-elasticsearch/security@7131b6a

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[codecov]

Codecov Report

Merging #323 (438f5f7) into master (358afe5) will decrease coverage by 0.15%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #323      +/-   ##
============================================
- Coverage     72.93%   72.78%   -0.16%     
+ Complexity     2000     1997       -3     
============================================
  Files           201      201              
  Lines          9563     9563              
  Branches        852      852              
============================================
- Hits           6975     6960      -15     
- Misses         2173     2191      +18     
+ Partials        415      412       -3     

Flag	Coverage Δ	Complexity Δ
cli	79.27% <ø> (ø)	0.00 <ø> (ø)
plugin	72.25% <100.00%> (-0.17%)	0.00 <1.00> (ø)

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Impacted Files	Coverage Δ	Complexity Δ
...opendistroforelasticsearch/ad/util/ParseUtils.java	57.57% <100.00%> (ø)	28.00 <1.00> (ø)
...ransport/DeleteAnomalyDetectorTransportAction.java	35.89% <0.00%> (-21.80%)	10.00% <0.00%> (-4.00%)
...asticsearch/ad/cluster/ADClusterEventListener.java	92.00% <0.00%> (+4.00%)	14.00% <0.00%> (+1.00%)