* Add a test/e2e/shell.go that slurps up everything in hack/e2e-suite
and runs it as a bash test, borrowing all the code from hack/e2e.go.
* Rip out all the crap in hack/e2e.go that deal with multiple tests
* Move hack/e2e-suite/goe2e.sh to hack/ginkgo-e2e.sh so that it
doesn't get slurped up.
Use the E2E_REPORT_DIR global environment variable to define the
location where the JUnit XML reports should be saved.
Modify the Jenkins e2e.sh script to export that variable pointing to the
top of the Jenkins build tree.
Tested by running `E2E_REPORT_DIR=${PWD}/.. hack/e2e-test.sh` and
confirmed ../junit.xml was generated and looked good.
