Rasa: 2.7.0 Release

Improvements

• #7691: Changed the default config to train the RulePolicy before the TEDPolicy. This means that conflicting rule/stories will be identified before a potentially slow training of the TEDPolicy.
• #7799: Updated validator used by rasa data validate to verify that actions used in stories and rules are present in the domain and that form slots match domain slots.
• #7912: Rename plot_histogram to plot_paired_histogram and fix missing bars in the plot.
• #8225: Changed --data option type in the rasa data validate` command to allow more than one path to be passed.

Bugfixes

• #8152: The file failed_test_stories.yml (generated by rasa test) now also includes the wrongly predicted entity as a comment next to the entity of a user utterance. Additionally, the comment printed next to the intent of a user utterance is printed only if the intent was wrongly predicted (irrelevantly if there was a wrongly predicted entity or not in the specific user utterance).
• #8309: Added check in PikaEventBroker constructor: if port cannot be cast to integer, raise RasaException
• #8388: Fixed bug where missing intent warnings appear when running rasa test
• #8611: Update should_retrain function to return the correct fingerprint comparison result even when there is a problem with model unpacking.
• #8719: Handle correctly Telegram edited message.

Miscellaneous internal changes

• #8591, #8641, #8654, #8658, #8802