elasticsearch client version in requirements.txt should match Dockerfile elasticsearch server version

[binarymax]

The client module version should match server installed version

Currently, in requirements.txt, the following version is elasticsearch==7.0.0

But in the notebooks/elasticsearch/.docker/es-docker/Dockerfile, the version of elastic is 7.6.2

The latest compatible client version is elasticsearch==7.6.0, and if the Dockerfile version changes (to for example 7.9.x, an appropriate client version match needs to be made and explicitly specified in the requirements.txt file.

[epugh]

Interestingly we are up to 7.16.2 in requirements.txt, but in Docker we are 8.8.2!