CHE-3257: display version number in CHE dashboard

[ashumilova]

What does this PR do?

Adds Che product version to be displayed in footer.

What issues does this PR fix or reference?

#3257

Signed-off-by: Ann Shumilova [email protected]

[codenvy-ci]

Build # 1304 - FAILED

Please check console output at https://ci.codenvycorp.com/job/che-pullrequests-build/1304/ to view the results.

[TylerJewell]

It is usually customary to also include the build # in the version as well in a footer. Do we have that information?

[benoitf]

we have kind of build number (scm revision) as part of the API

$ curl -X OPTIONS http://localhost:8080/api/
{"scmRevision":"5be04c1775a6ec80c5eccb8562842cc2e8697a72","specificationTitle":"Codenvy REST API","specificationVersion":"1.0-beta2","implementationVendor":"Codenvy, S.A.","specificationVendor":"Codenvy, S.A.","implementationVersion":"5.0.0-M9-SNAPSHOT"}

we may ask version remotely directly from API instead of adding version into product.json file

[ashumilova]

+1 on reworking PR and requesting API version instead of modifying product.json files by maven task.