fix bug 1058226 - Bootstrap webapp-django Once

Replaces jenkins-tests with jenkins script in webapp,
since 'bin/jenkins.sh' is not being used elsewhere.

This will stop webapp being bootstraped twice. Once in
'scripts/bootstrap.sh' and second in 'scripts/test.sh'
Rename 'jenkins.sh' to 'ci.sh' in webapp-django

As we use both Jenkins and Travis for CI, having the script specifically
called 'jenkins.sh' doesn't make sense.

fix bug 1058226
Fix reference to webapp-django jenkins script.

Updates comment in webapp-django bootstrap.sh regarding enabling of
offline compression in local settings.

fix bug 1058226
Merge pull request #2312 from bramwelt/fix-bug-1058226-bootstrap-webapp-django-once

fix bug 1058226 - Bootstrap webapp-django Once