IOS: fix a crash in malformed isakmp profiles

[dhalperi]

Fix #5849

[batfish-bot]

This change is 

[progwriter]

Reviewed 4 of 4 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved

[codecov]

Codecov Report

Merging #5851 into master will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #5851      +/-   ##
============================================
- Coverage     71.99%   71.99%   -0.01%     
+ Complexity    33878    33869       -9     
============================================
  Files          2793     2793              
  Lines        139556   139561       +5     
  Branches      16769    16769              
============================================
- Hits         100479   100472       -7     
- Misses        31209    31218       +9     
- Partials       7868     7871       +3     

Impacted Files	Coverage Δ	Complexity Δ
...in/java/org/batfish/datamodel/IkePhase1Policy.java	95.00% <100.00%> (+0.26%)	11.00 <1.00> (ø)
...batfish/representation/cisco/CiscoConversions.java	88.12% <100.00%> (+0.38%)	175.00 <0.00> (+2.00)
...g/batfish/datamodel/flow/IncomingSessionScope.java	84.61% <0.00%> (-15.39%)	7.00% <0.00%> (-1.00%)
.../src/main/java/org/batfish/datamodel/flow/Hop.java	53.33% <0.00%> (-6.67%)	5.00% <0.00%> (-1.00%)
...c/main/java/org/batfish/dataplane/rib/RibTree.java	89.58% <0.00%> (-4.17%)	27.00% <0.00%> (-1.00%)
...rc/main/java/org/batfish/datamodel/flow/Trace.java	87.09% <0.00%> (-3.23%)	11.00% <0.00%> (-2.00%)
...org/batfish/datamodel/flow/BidirectionalTrace.java	81.81% <0.00%> (-2.28%)	14.00% <0.00%> (-1.00%)
...col/src/main/java/org/batfish/role/InferRoles.java	89.54% <0.00%> (-1.37%)	50.00% <0.00%> (-1.00%)
...src/main/java/org/batfish/coordinator/PoolMgr.java	62.92% <0.00%> (-1.13%)	15.00% <0.00%> (-1.00%)
...rg/batfish/dataplane/ibdp/EigrpRoutingProcess.java	92.72% <0.00%> (-0.39%)	68.00% <0.00%> (-1.00%)
... and 4 more

[dhalperi]

Reviewed 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved