Added script to install multiple dependencies from submodules and then run E2E tests from a submodule

[fernst]

This can be useful in multi-module projects if structured like:

Parent project
├ Submodule 1
├ Submodule 2
├ Submodule 3
└ E2E tests submodule

Note that the parent project and all submodules must be build before using this script.

Example usage in https://github.com/data-integrations/google-cloud/blob/gcp-modules-v3/.github/workflows/e2e.yml#L71

[itsankit-google]

We will need to build the dependency module first then only we can install it from the target folder right??

[fernst]

yes, the entire project needs to be built using mvn package before installing all dependencies and running E2E tests

[itsankit-google]

Looks like this script isn't taking care of that.

The older script first builds the plugin module and then installs it.
ref - https://github.com/cdapio/cdap-e2e-tests/blob/develop/src/main/scripts/run_e2e_test.py#L69

[fernst]

Should this be the responsibility of the plugin? With multi-module projects there may be optimizations (such as only building certain modules) or using multiple threads when compiling. I wanted to leave this for the parent project to decide how to handle.

[itsankit-google]

Discussed offline to keep it as the responsibility of caller that module is built before running the script.
Can we add a comment here in the script for future reference??

[itsankit-google]

lgtm