[Spring Boot Data] Added ProcessRegistry aware factory methods.
[Process registry] Added ProcessRegistries class.
[Process registry] Created ZooKeeperProcessRegistry.
[Process registry] Added MD intro.
[Process registry][MD] Added "@Value" process registry example.
[Process registry] Added log4j bridge to process test API.
[Process test API] Added test process-sample-camel-spring dependency to pom.xml.
[FABRIC-1117] PaxLoggingTest reliably fails with clean repo
[FABRIC-1118] NoSuchMethodError: org.apache.felix.utils.properties.Properties.setProperty
[FABRIC-1100] - Immutable Version/Profile constructs
Review FabricService.getDefaultVersion(). Add FabricService.getDefaultVersionId(), getRequiredDefaultVersion()