Revisit DataStoreTemplate handling.

* Remove DataStoreTemplateRegistry
* Add RuntimeProperties attributes
[FABRIC-1116] ProcessControllerTest fails consistently and prevents PR processing
[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
Fixed wrong link
[FABRIC-1118] NoSuchMethodError: org.apache.felix.utils.properties.Properties.setProperty
Revert configuration property 'containerId' back to 'name'
Process - changed behavior for missing env_variable. Now they are kept unreplaced. Needed for specific profiles that require to know the installation folder.
[Process test API] Optimized POM.
[Spring Boot][Data] AbstractQuery and Resources DTOs are now serializable.
[Spring Boot][Data] Added RestRepository#listByQuery method.
[Spring Boot][BOM] Added default SB Maven plugin configuration.
add git to the http proxy configuration
fixes #2057 so that the fabric8 git repository is exposed properly via the http gateway