Ignore asset url query string or anchor when generating path

allocations

https://bugs.ruby-lang.org/issues/7166

Refactor AssetUrlHelper

Conflicts:
	railties/test/application/configuration_test.rb

Removed useless "extend SanitizeHelper::ClassMethods"

Minor cleanup, helper method was only used once

Since SanitizeHelper includes ActiveSupport::Concern,
extending of it ClassMethods is no needed.

refactoring of uniqueness validate_each

get scope_value only one time dependig on reflection

Fix typo in inet and cidr saving

Use 1.9 Hash syntax in railties

remove 'then' from conditional statement

Fixes #7914 - PostgreSQL adapter doesn't fetch column defaults when using multiple schemas and domains

Remove parsing of character type default values for 8.1 formatting since
Rails doesn't support postgreSQL 8.1 anymore.

Remove misleading comment unrelated to code.

According to postgreSQL documentation:
(http://www.postgresql.org/docs/8.2/static/catalog-pg-attrdef.html)
we should not be using 'adsrc' field because this field is unaware of
outside changes that could affect the way that default values are
represented. Thus, I changed the queries to use
"pg_get_expr(adbin, adrelid)" instead of the historical "adsrc" field.

PostgreSQL adapter properly parses default values when using multiple
schemas and domains.

When using domains across schemas, PostgresSQL prefixes the type of the
default value with the name of the schema where that type (or domain) is.

For example, this query:
```
SELECT a.attname, d.adsrc
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = "defaults"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum;
```

could return something like "'<default_value>'::pg_catalog.text" or
"(''<default_value>'::pg_catalog.text)::text" for the text columns with
defaults.

I modified the regexp used to parse this value so that it ignores
anything between ':: and \b(?:character varying|bpchar|text), and it
allows to have optional parens like in the above second example.

Clean up Gemfile entry (replace double quotes with single quotes) [ci skip]