Added hive example using jmx exporter to expose prometheus metrics

[hecomp]

Description

What does this PR do?

• Added stream metrics.
• Added hive example using jmx exporter to expose prometheus metrics

PR checklist for examples

Check these items before merging the PR.

• Each example contains a README file.
• README documents all steps and variables required to run the example. The simplest way to confirm this is to follow the instructions on a clean machine.
• README file contains the links to the official documentation with relevant configuration and to the metrics published if that is available.
• Used images of apps and collectors have to be pinned, "latest" should never be used.
• Evidences with screenshots provided from the reviewer.
• Includes a file called metrics.csv with metrics produced by the example.
  The file should have these 5 headings: Name, Description, Unit, DataType, Attributes.
  Description is not provided for all metrics, so it may be blank. Attributes are also not always provided. When there are multiple attributes on a metric reord they should be space separated.
• Dashboard provided with example and put to the folder "dashboard" inside the example folder.
• At least one screenshot of the proposed dashboard is included in this PR. If you're proposing substantive changes to queries or new queries then please ensure your screenshot shows relevant data.
• All chart names in the dashboard are in Title case.
• All query names in the dashboard are lower case letters, beginning the first query of each chart as "a" and proceeding alphabetically ... "b", "c", etcetera.

[nslaughter]

Overall looks great because it works with no fuss for Docker user.
One thing I think we should simplify a little is how the echo redirect thing writes a script in the Dockerfile. Easier to see what's going on there if you just have the script. Also I will add a couple of other minor remarks inline and we can get this merged tomorrow when addressed.

[nslaughter]

One way to clean this up would be put this as a script in the build context and just append the call to that script in the sh. Take 30 minutes max to clean that up for readability. If it takes longer we have people who specialize in that for you ;)

[nslaughter]

This needs a README. Just one of the simple ones that tells how to run it and what you get. We need that before we merge.

Otherwise... I reviewed by running and validating in logs.