[maven-release-plugin] copy for tag v2.4.1

[maven-release-plugin] copy for tag v2.5.0

[maven-release-plugin] copy for tag v2.4.0

[maven-release-plugin] copy for tag v2.3.0

[maven-release-plugin] copy for tag v2.2.0

[maven-release-plugin] copy for tag v2.1.0

[maven-release-plugin] copy for tag v2.0.1

[maven-release-plugin] copy for tag v2.0.0

Merge pull request SAML-Toolkits#38 from jrowny/patch-1

IssueInstant should be UTC