deps: upgrade tomcat for CVE-2021-42340

[dhalperi]

No description provided.

[batfish-bot]

This change is 

[sfraint]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @arifogel)

[codecov]

Codecov Report

Merging #7569 (03b738c) into master (f5a81cf) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #7569      +/-   ##
============================================
- Coverage     73.58%   73.58%   -0.01%     
+ Complexity    41337    41335       -2     
============================================
  Files          3261     3261              
  Lines        163172   163172              
  Branches      19568    19568              
============================================
- Hits         120074   120073       -1     
  Misses        33707    33707              
- Partials       9391     9392       +1     

Impacted Files	Coverage Δ
...main/java/org/batfish/datamodel/acl/AclTracer.java	63.69% <0.00%> (-1.28%)	⬇️
...src/main/java/org/batfish/datamodel/Interface.java	84.10% <0.00%> (-0.31%)	⬇️
...tfish/representation/cisco/CiscoConfiguration.java	84.52% <0.00%> (-0.16%)	⬇️
...ain/java/org/batfish/storage/FileBasedStorage.java	86.06% <0.00%> (+0.61%)	⬆️
...src/main/java/org/batfish/coordinator/PoolMgr.java	55.95% <0.00%> (+1.19%)	⬆️