fix(dependencies): fix servlet-api dependency version conflict (#211)

Transitively, bonita-web is now pulling javax servlet-api in version 3.0.1
instead of 2.5
This commit fixes the version by ensuring all versions are now aligned.
It also updates the Http servlet request/response mocks to adapt to 3.0.1

Closes [BS-16441](https://bonitasoft.atlassian.net/browse/BS-16441)