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://www.apache.org/licenses/LICENSE-2.0 migrated to:
  https://www.apache.org/licenses/LICENSE-2.0 (https result 200).
• http://www.pivotal.io migrated to:
  https://www.pivotal.io (https result 301).
• http://www.spring.io migrated to:
  https://www.spring.io (https result 301).

Ignored

These URLs were intentionally ignored.

• http://maven.apache.org/POM/4.0.0
• http://maven.apache.org/maven-v4_0_0.xsd
• http://www.w3.org/2001/XMLSchema-instance