SDAP-490 - expanding openapi spec

[kevinmarlis]

openapi.yml expanded to include additional commonly used algorithms:

• dailydifferenceaverage_spark
• datainbounds
• latitudeTimeHofMoellerSpark
• longitudeTimeHofMoellerSpark
• maxMinMapSpark
• timeAvgMapSpark
• timeSeriesSpark
• varianceSpark

Additional modifications:

• Added a data mapping section for the algorithms that return spatial data: /timeAvgMapSpark, /maxMinMapSpark, /varianceSpark.
• Added a general SparkMeta schema that is commonly used by many of these algorithms.

NOTE: Going through the algorithms revealed a lack of parameter naming conventions. Consistency among the algorithms would be nice, but changes could have larger implications downstream ie: frontend tools. This PR doesn't address this.

[kevinmarlis]

Some quick additional things I just thought of:

• Should we make a Utility section that could include the version and job endpoints? I didn't include endpoints like capabilities, list, heartbeat, etc. Do we want to include them? They could go in the Utility section
• The job endpoints don't have responses in the spec...should they?

[kevinmarlis]

Closing in favor of #310