remove localhost dependencies in http_security test

Make sure the http_security test works when run on an actual cluster under
rtcloud.
increase timeouts for SC operations in ensemble tests
Adapt riak_test for riak_core applications.

Adapt riak_test to more easily be used with riak_core based
applications.  This involves removing a few assumptions about executable
names.
Merge pull request #609 from basho/features/csm/floppystore

Adapt riak_test for riak_core applications.
Merge pull request #589 from basho/vinoski/http_security_cluster

remove localhost dependencies in http_security test
Remove clients tests because they are already running on every commit on builders.
Merge pull request #629 from basho/sdc-remove-clients-tests

Remove clients tests
Merge pull request #628 from basho/bugfix/ensemble-timouts

increase timeouts for SC operations in ensemble tests
- Adds tests to verify the operation of list keys and list buckets when
  an undefined bucket type is specified.  (defect #875)
- Adds a description of the reset-current-env.sh script and its
  usage to README.md
- Corrects a spelling mistake in an information message emitted by
  the reset-current-env.sh script