Spring [SPR-12159] Add filtered properties

Sometimes I need to load only subset of properties from files.

https://jira.spring.io/browse/SPR-12159

Comment From: alien11689

I have signed and agree to the terms of the SpringSource Individual Contributor License Agreement.

Comment From: pivotal-issuemaster

@alien11689 Please sign the Contributor License Agreement!

Click here to manually synchronize the status of this Pull Request.

See the FAQ for frequently asked questions.

Comment From: pivotal-cla

@alien11689 Please sign the Contributor License Agreement!

Click here to manually synchronize the status of this Pull Request.

See the FAQ for frequently asked questions.