URL Cleanup

[spring-operator]

This commit updates URLs to prefer the https protocol. Redirects are not followed to avoid accidentally expanding intentionally shortened URLs (i.e. if using a URL shortener).

Fixed URLs

Fixed Success

These URLs were fixed successfully.

• http://repository.mulesoft.org/releases/ migrated to:
  https://repository.mulesoft.org/releases/ (https result 200).
• http://stackoverflow.com/questions/tagged/spring-security migrated to:
  https://stackoverflow.com/questions/tagged/spring-security (https result 200).
• http://www.apache.org/licenses/LICENSE-2.0.txt migrated to:
  https://www.apache.org/licenses/LICENSE-2.0.txt (https result 200).
• http://jira.springsource.org/browse/SES migrated to:
  https://jira.springsource.org/browse/SES (https result 301).
• http://repo.spring.io/plugins-release migrated to:
  https://repo.spring.io/plugins-release (https result 302).