phase4 3.0.0 Release Candidate 1

• Updated to xmlsec 3.0.5
• Updated to ph-commons 11.1.10
• Updated to peppol-commons 9.6.0
• Removed the phase4-spring-boot-demo submodule in favour of https://github.com/phax/phase4-peppol-standalone
• Added new class Phase4PeppolReceiverConfigurationBuilder to build Phase4PeppolReceiverConfiguration objects
• Removed the overload Phase4PeppolDefaultReceiverConfiguration.getAsReceiverCheckData(X509Certificate) created in beta6 in favour of the builder
• Removed the interfaces IAS4TrustStoreDescriptor and IAS4KeyStoreDescriptor (added in beta2) in favour of ITrustStoreDescriptor and IKeyStoreAndKeyDescriptor from ph-commons
• The classes AS4KeyStoreDescriptor and AS4TrustStoreDescriptor (added in beta2) are only shells to provide phase4 specific setup
• Made the AP certificate checker in the Peppol sender builder customizable

Full Changelog: phase4-parent-pom-3.0.0-beta6...phase4-parent-pom-3.0.0-rc1