* Always use jks as the KeyStore type instead of trying to extract it from the resource extension. Fixes#1176
* Use property to decide the type of KeyStore to create
(new, clean PR from required changes on [#1120](https://github.com/spring-cloud/spring-cloud-config/pull/1120#issuecomment-419998469), also having a clean history for merge)
Following the spring-cloud#1003 PR, I went on a likewise PR to add support for [Gitea](https://gitea.io), a Gogs fork.
On that PR there's a comment asking for a small refactor regarding Github and Gitlab PropertyPathNotificationExtractors so, given the reduced scope of the change, also went for it. As spring-cloud#1003 also includes the appropiate files for Gogs support, I also threw them in. And, likewise, GiteePropertyPathNotificationExtractor's spring-cloud#1107 PR.
So this PR ended up having:
* `[Github|Gitlab|Gitee]PropertyPathNotificationExtractor` common behaviour refactored into a `BasePropertyPathNotificationExtractor` class
* spring-cloud#1003 PR (Gogs support), refactored to reuse the `BasePropertyPathNotificationExtractor` class
* spring-cloud#1107 PR (Gitee using webhook contents as PropertyPathNotification), refactored to reuse the `BasePropertyPathNotificationExtractor` class
* Gitea support, using the `BasePropertyPathNotificationExtractor` class
I've mantained author tags on files regarding those PRs, in order to respect code authorship as much as possible (if there's anything missing, I'll gladly add whatever commits necessary). Also, as Github notes that those PRs are already mergeable, their corresponding authors must've signed the corresponding ICLAs, I assume this PR should be safe to merge.
best regards,
juan pablo
