Fix non-functional delete_all method in XCache cache driver
added test for match_collection
fix test
fix style
Merge pull request #1779 from it-can/strict_match_collection_test

Strict match collection test
variable 'namespaced' is never used
Merge pull request #1780 from daidais/unused

variable 'namespaced' is never used
Merge pull request #1776 from tominon/patch-1

Fix non-functional delete_all method in XCache cache driver
Reintroduces missing variable. Fixes #1782
Added "specials" into Validation which will check a-zA-Z and special letters in each language
Added "specials" into Validation which will check a-zA-Z and special letters in each language
Merge pull request #1785 from dercoder/1.8/develop

Added "specials" into Validation