Tidy up the plugin v1 conversion code

[radu-stefan-dt]

Some organization and re-structuring would be good for our plugin v1 conversion code.

Main points to address:

• schema conversion functions (both from JMX and Python) should be moved into src/utils folder
• Consider opportunities for reducing duplication between JMX & Python conversions:
  • Either merging the flows with additional parameters
  • Or, given we plan to enhance python conversion, extract more of the flow into utility functions to be moved into src/utils

[radu-stefan-dt]

@dlopes7 I'm trying to organise work based on releases.
Should I include this in upcoming release (1 month ish) or next one (2 months ish)?

[dlopes7]

1 monthish