Fix example command in README for running system tests on a distro
Add a few more docs about running system tests
Merge pull request #179 from cprice-puppet/maint/master/fix-readme-for-running-system-testswq

Fix example command in README for running system tests on a distro
Correct database_user param name

README formerly incorrectly referred to the password_hash parameter as password.
Merge pull request #184 from MaxMartin/master

Correct README
Convert system tests to use rspec-system

This patch ports all of the existing system tests to use rspec-system instead.

To assist with this conversion some patches were made to fix OS compatibility
where necessary. We also added an ensure parameter to the postgresql::server
class to assist with removing PostgreSQL configuration to aid with testing
cleanups.

The documentation has been updated to indicate test usage with rspec-system,
we've also renamed the 'tests' directory to 'examples'.

Signed-off-by: Ken Barber <ken@bob.sh>