postgresql_user module: Gracefully handle ALTER ROLE on read-only postgres servers.
Fix postgresql_user to understand PG namespaces

Previously postgresql_user quoted user supplied identifers to create
grant statements that look like this:

    GRANT SELECT on "tablename" to "user";

Which only works if the tablename is not in a namespace.  If you supply
a namespaced tabelname like "report.revenue" then it creates this
incorrect statement:

    GRANT SELECT on "report.revenue" to "user";

Which will not find the "revenue" table in the "report" namespace, but
will rather look for a table named "report.revenue" in the current
(default public) namespace.  The correct form is:

    GRANT SELECT on "report"."revenue" to "user";

This approach could have the unfortunate effect that code that
previously relied on the other behavior to grant privileges on tables
with periods in their names may now break.  PostgreSQL users
typically shouldn't name tables as such, and users can still access the
old behavior and use tablenames with periods in the if they must by
supplying their own quoting.
Allow explict setting of vpc_security_groups to allow modification of security groups of RDS instances within a VPC
Config resoution order correction and documentation.
Minor existing typo fix.
Merge branch 'fix_rds_modify_security_group' of https://github.com/mohangk/ansible into mohangk-fix_rds_modify_security_group
Merge pull request #6021 from risaacson/issue_5359_2

Config resoution order correction and documentation.
Merge branch 'mohangk-fix_rds_modify_security_group' into devel
Fixing usage string in ansible-galaxy install for role files
Document "|default" Jinja2 filter example.
Some minor docs corrections.
Document ansible_managed changing the template.
Add sudo note.
add note about pipelining
Filter name is singular
Uniform spacing across all filter examples
Fix path to index.html when launching browser
Add link to ansible-examples repo
Add link (with minor rewording) to jinja2 builtin filters
Merge branch 'postgres_alter_role' of https://github.com/jinnko/ansible into jinnko-postgres_alter_role

Conflicts:
	library/database/postgresql_user