Special case for $datadir on Amazon

Closes #252
Merge pull request #262 from bcomnes/amazon

Special case for $datadir on Amazon
fixed the rspec test to include 'sha1' in
Fix documentation about username/password for the postgresql_hash function

This is messed up in different ways and this commit brings it in align with what the function actually does.
FM-103: Add metadata.json to all modules.
Merge pull request #269 from apenney/metadata

FM-103: Add metadata.json to all modules.
Merge pull request #268 from duritong/master

Fix documentation about username/password for the postgresql_hash functi...
Merge pull request #267 from neilnorthrop/master

fixed the rspec test to include 'sha1' in
Prepare 3.0.0-rc2 release.
Merge pull request #272 from apenney/200-rc2-release

Prepare 3.0.0-rc2 release.
Expose owner in db definition
Tests for owner param
Merge pull request #273 from ares/master

Expose owner in db definition
Add a parameter to (un)manage pg_hba.conf
Merge pull request #261 from mcanevet/manage_pg_hba_conf

Add a parameter to (un)manage pg_hba.conf
Prepare 3.0.0-rc3 release.
Merge pull request #278 from apenney/300-release

Prepare 3.0.0-rc3 release.
Prepare 3.0.0 release.
Merge pull request #279 from apenney/300-release

Prepare 3.0.0 release.