Properly set workflow type for rerun

[WIIASD]

Issue #, if available:

#39

Description of changes:

We are not properly setting workflowType field when --workflow-type is not passed in by customer. This change ensures we default workflowType to the same as input run for the rerun tool

Testing

Tested the following commands, all worked as expected:

python3 -m omics.cli.rerun 2420306 
python3 -m omics.cli.rerun 2420306 --workflow-id 1830181
python3 -m omics.cli.rerun 2420306 --run-id 2420306 (this was triggering the same bug before as well)

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