MissingTranslationHandlerLog changes functionality

[JaZo]

Subject of the issue

When using the MissingTranslationHandlerLog, the $translate service does not reject the translation-promise when the translation is missing.

Your environment

• version of angular-translate: 2.12.1
• version of angular-translate-handler-log: 2.12.1
• version of angular: 1.5.8
• which browser and its version: Firefox Dev 51.0

Steps to reproduce

Please see these plunkers: without missing-translation-handler-log and with missing-translation-handler-log.

Expected behaviour

I would expect that the $translate service always rejects the translation-promise with or without using the MissingTranslationHandlerLog as stated in the documentation.

Actual behaviour

The $translate service resolves the translation-promise when using the MissingTranslationHandlerLog.

[knalli]

Do you like providing a PR?