Update all PHPUnit Tests to follow consistent format

[pattonwebz]

Makes all the test classes follow the same format:

• Files named with Test.php suffix
• Using PascalCase
• Classes are named the same as the file.
• Where the Test Class is testing a Concrete Class from the plugin the test is named the same as the class under test with the suffix added.
• Tests are in directory structure matching the structure in the plugin code.

Other changes:

• Tests for edac_ordinal() are updated so that they pass even when php-intl is unavailable