Add class configuration functionality instead of php files

[sseidelmann]

Here is a configuration enhancement for passing classes in configuration files instead of files. It will look like:
version-generator: "Liip\\RMT\\Tests\\Unit\\Config\\ExternalClasses\\CustomVersionPersister"

Now you can use your classes with your own composer autoloading.

[ppetermann]

• this PR breaks tests
• the phpunit version added is quite limited, that should be wider
• the new files don't end on a new line

generally: a pull request should be one feature, so php unit should be one, class config options another, however this isn't too bad with the phpunit stuff as thats just a minor change.

[sseidelmann]

@ppetermann For PHPUnit see #121

Imho the php version support pre 5.6 should be dropped.
It would make everything a little bit easier

[jeanmonod]

@sseidelmann As you can see RMT is an old project that deserve some care... Anyway thanks for all your efforts so far! If I get it right we need one more PR, #124, from @acrobat to have a better PHPUnit setup before been able to merge this final PR. Right?

[lsmith77]

I agree to drop at least php 5.3 .. imho 5.5. should only be drop if creates a lot of hackery

[sseidelmann]

@lsmith77 @jeanmonod When merge the PR #124 I will check the code again and give some updates later.

[dbu]

#124 is merged

[BradCrumb]

Any news on this? I really like the change.

[jeanmonod]

@sseidelmann as #124 is merged, do you want to try to merge master into your branch an see if the tests are still broken?