Terminate security for email transport handlers

[skkosuri-amzn]

Issue #, if available:
Terminate security for email transport handlers
#6

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 #262 into master will increase coverage by 0.01%.
The diff coverage is 96.29%.

@@             Coverage Diff              @@
##             master     #262      +/-   ##
============================================
+ Coverage     80.37%   80.38%   +0.01%     
- Complexity      194      195       +1     
============================================
  Files           150      150              
  Lines          4897     4905       +8     
  Branches        647      647              
============================================
+ Hits           3936     3943       +7     
+ Misses          616      613       -3     
- Partials        345      349       +4     

Impacted Files	Coverage Δ	Complexity Δ
...search/alerting/action/DeleteEmailAccountAction.kt	50.00% <ø> (ø)	0.00 <0.00> (ø)
...icsearch/alerting/action/DeleteEmailGroupAction.kt	50.00% <ø> (ø)	0.00 <0.00> (ø)
...ing/transport/TransportSearchEmailAccountAction.kt	62.50% <75.00%> (+5.35%)	0.00 <0.00> (ø)
...rting/transport/TransportSearchEmailGroupAction.kt	62.50% <75.00%> (+5.35%)	0.00 <0.00> (ø)
...ticsearch/alerting/action/GetEmailAccountAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...asticsearch/alerting/action/GetEmailGroupAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...csearch/alerting/action/IndexEmailAccountAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...ticsearch/alerting/action/IndexEmailGroupAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...search/alerting/action/SearchEmailAccountAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
...icsearch/alerting/action/SearchEmailGroupAction.kt	66.66% <100.00%> (ø)	0.00 <0.00> (ø)
... and 11 more

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