tests: simplify the Jenkins script

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
tests: update build status link in README

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
tests: use the same shell script for all Jenkins projects

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
documentation: fix build status link for master branch

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
tests: use "All view" instead of "Active" view for Jenkins

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>