Add support for SLES 11

Adds support for SLES 11 using the package postgresql91.
MODULES-1213 link pg_config binary into /usr/bin if not already in /usr/bin or /usr/local/bin
MODULES-1213 remove inadvertantly added vagrant-wrapper gem
MODULES-1213 fix typo
Add correct documentation for pg_ident_rule type
doc: Fix anchor links in README TOC

Several of the anchor links in the README's table of contents were
broken because of missing underscores.
Fixes the accidental erasing of pg_ident.conf

Even with manage_pg_ident_conf to false, or undef (witch defaults to
false), a concat object would be created, erasing the pg_ident.conf file
remove duplicatie "description" line from Metadata.json
Fixed deprecation warning for class param  in server.pp. Changed subclasses of server to use ::_version, which will be assigned the value from globals or (deprecated) class param.
Merge puppetlabsmaster in initdb_ordering_issue
Support changing PGDATA on RedHat
Fix typo
Don't test on 3.5.0.rc3 any more
Bump deps for postgresql 4.0 release
Remove firewall management

The firewall management really belongs outside of the module that
manages postgresql, like in a profile.
Create acceptance test for pgdata
Remove bogus -D argument
Fix indentation.
Update spec_helper for more consistency
Revert "Support changing PGDATA on RedHat"