New Wrapper: GenEnsProd

[JohnHalleyGotway]

Describe the New Feature

dtcenter/MET#1904 adds an initial version of the new Gen-Ens-Prod tool to the met-10.1.0-beta3 MET development release. This issue adds a wrapper for calling that Gen-Ens-Prod tool. Just like Gen-Ens-Prod is a subset of the Ensemble-Stat tool, it's wrapper can largely be a subset of the existing Ensemble-Stat wrapper.

From @georgemccabe:
The new wrapper will be able to borrow existing components from other wrappers to implement all of the functionality. The wrapper will support the following functionality:

• Obtain a list of input files, write a file list file, and pass to -ens argument
• Set environment variables to override values in MET config file (all dictionaries and variables in the new config file are supported in other wrappers)
• Pass wrapped config file as -config argument
• Build output file path from template/dir and pass to -out argument
• Set optional -ctrl path based on template/dir (GEN_ENS_PROD_CTRL_[TEMPLATE/DIR] or GEN_ENS_PROD_CONTROL_[TEMPLATE/DIR])

Acceptance Testing

List input data types and sources.
Describe tests required for new functionality.

Time Estimate

Estimate the amount of work required here.
Issues should represent approximately 1 to 3 days of work.

Sub-Issues

Consider breaking the new feature down into sub-issues.

• Add a checkbox for each sub-issue here.

Relevant Deadlines

List relevant project deadlines here or state NONE.

Funding Source

2793541

Define the Metadata

Assignee

• Select engineer(s) or no engineer required: @georgemccabe
• Select scientist(s) or no scientist required: @j-opatz

Labels

• Select component(s)
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• Select requestor(s)

Projects and Milestone

• Select Repository and/or Organization level Project(s) or add alert: NEED PROJECT ASSIGNMENT label
• Select Milestone as the next official version or Future Versions

Define Related Issue(s)

Consider the impact to the other METplus components.

• METplus, MET, METdatadb, METviewer, METexpress, METcalcpy, METplotpy
• Create the new Gen-Ens-Prod tool for ensemble product generation. MET#1904 creates the Gen-Ens-Prod tool.
• No other downstream issues needed. Although training materials should be developed eventually.

New Feature Checklist

See the METplus Workflow for details.

• Complete the issue definition above, including the Time Estimate and Funding source.
• Fork this repository or create a branch of develop.
  Branch name: feature_<Issue Number>_<Description>
• Complete the development and test your changes.
• Add/update log messages for easier debugging.
• Add/update unit tests.
• Add/update documentation.
• Push local changes to GitHub.
• Submit a pull request to merge into develop.
  Pull request: feature <Issue Number> <Description>
• Define the pull request metadata, as permissions allow.
  Select: Reviewer(s) and Linked issues
  Select: Repository level development cycle Project for the next official release
  Select: Milestone as the next official version
• Iterate until the reviewer(s) accept and merge your changes.
• Delete your fork or branch.
• Close this issue.