As build arg BONITA_VERSION was ignored

that suits the docker version, as it is different from the distrib one.
For now, the version is copied, and any modification in the file must
be copied to the docker version.
With the proposed change, the docker version is generated from the
distrib version, with minor changes

to test docker image

(+ include tests in docker image build on CI) => commented out for now,
as GOSS tool is missing on the CI slave image

Closes [BR-534](https://bonitasoft.atlassian.net/browse/BR-534)

 Covers [BR-500](https://bonitasoft.atlassian.net/browse/BR-500)

Closes [BR-530](https://bonitasoft.atlassian.net/browse/BR-530)

Now it builds BOS & SP images on PR and master/dev builds and pushes it to quay.io (BOS + SP)

Closes [BR-530](https://bonitasoft.atlassian.net/browse/BR-530)

instead of a separate Github repo, use distrib repo to build docker images.

`build.sh` can be run with the local build snapshot build when the version is `SNAPSHOT` see `infrastructure/build_and_publish_docker_image.groovy`

- in order for them to be deployed on startup by the engine

Covers [BR-500](https://bonitasoft.atlassian.net/browse/BR-500)

that index.jsp was added to replace root application and to redirect to
/bonita

Because of a refactor on how distrib is organized, that index.jsp was
not copied anymore in `/server/webapps/ROOT`

Move it in the right folder and change the order of copy to have it
where it belongs.

Closes [BR-478](https://bonitasoft.atlassian.net/browse/BR-478)

by excluding jar lib from tomcat WAR file, as JTA is already included
in tomcat/server/lib/bonita.

This problem comes from bonita Engine that now has
jta lib as a dependency, which is normal.

Without `level` at the end of the property, it doesn't work

Closes [BR-430](https://bonitasoft.atlassian.net/browse/BR-430)