Using https instead of http in pom.xml

[hardcoresam]

No description provided.

[hardcoresam]

This pull request fixes #102
@ulisesbocchio Can you take a look at this. The http is causing our builds to fail and we are stuck because of this.

[andybirenzi]

I was able to report this issue, I'm getting " Failed to collect dependencies at com.github.ulisesbocchio:spring-boot-security-saml:jar:1.17 -> org.springframework.security.extensions:spring-security-saml2-core:jar:1.0.9.RELEASE -> org.opensaml:opensaml:jar:2.6.6: Failed to read artifact descriptor for org.opensaml:opensaml:jar:2.6.6: Could not transfer artifact org.opensaml:opensaml:pom:2.6.6 from/to maven-default-http-blocker (http://0.0.0.0/): Blocked mirror for repositories: [repository.spring.release (http://repo.spring.io/release, default, releases+snapshots), mulesoft (http://repository.mulesoft.org/releases/, default, releases+snapshots)] -> [Help 1]" could you please merge this change and see if will be the fix?