Adding code to allow for input validation to continue if value is empty instead of just being marked as valid if empty.  Required to test for validity of an empty value based on context.
Tests for added Continue If empty functionality.
Adding code to allow for input validation to continue if value is empty instead of just being marked as valid if empty.  Required to test for validity of an empty value based on context.
Tests for added Continue If empty functionality.
Splitting 'continue if empty' functionality into its own interface.  Fixing a failing unit test; test was not providing data for a required input.
Catching up with remote differences.
Fixing one test to actually test the new functionality for continue if empty, removing redundant tests that mysteriously turned up.
A test I had added didn't actually add any assertions due to a line being commented out.
Merge pull request #4165 from zburnham/validate_empty_with_context

Validate empty with context

Conflicts:
	library/Zend/InputFilter/Factory.php
[#4165] CS fixes

- per php-cs-fixer
Merge branch 'feature/4165' into develop

Close #4165