Fix for action exceptions causing application to hang

[vavison]

Description

Exceptions were being thrown from failed actions before the executor had cleaned up the execution pools, resulting in the application hanging

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

Tested locally to verify hanging is no longer happening when an exception is thrown within an action

[coveralls]

Pull Request Test Coverage Report for Build 235

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 7 unchanged lines in 7 files lost coverage.
• Overall coverage increased (+0.2%) to 76.619%

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Files with Coverage Reduction	New Missed Lines	%
waimak-storage/src/main/scala/com/coxautodata/waimak/storage/AuditTableFile.scala	1	95.1%
waimak-core/src/main/scala/com/coxautodata/waimak/log/Logging.scala	1	30.77%
waimak-core/src/main/scala/com/coxautodata/waimak/dataflow/DataFlow.scala	1	98.82%
waimak-storage/src/main/scala/com/coxautodata/waimak/storage/Storage.scala	1	87.5%
waimak-core/src/main/scala/com/coxautodata/waimak/dataflow/ParallelActionScheduler.scala	1	96.61%
waimak-storage/src/main/scala/com/coxautodata/waimak/storage/FileStorageOps.scala	1	93.1%
waimak-core/src/main/scala/com/coxautodata/waimak/dataflow/spark/SparkDataFlow.scala	1	86.67%
<!--	Total:	7		-->

Totals
Change from base Build 231:	0.2%
Covered Lines:	911
Relevant Lines:	1189

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💛 - Coveralls