MULE-7524: Encoded characters not working when using expressions for dynamic endpoints

_ Adding property getters in URIBuilder
_ Creating DynamicURIBuilder to create dynamic endpoint's URIs
_ Updating DynamicOutboundEndpoint to use a DynamicURIBuilder
_ Updating DynamicOutboundEndpoint creation on HttpProxy
_ Updating old tests that were using encoded mule expressions in the address's path
_ Updating migration guide

Conflicts:
	distributions/standalone/src/main/resources/MIGRATION.txt
	patterns/core/src/main/java/org/mule/transport/http/construct/HttpProxy.java
	tests/integration/src/test/java/org/mule/test/integration/endpoints/DynamicEndpointWithEncodedUrlTestCase.java
MULE-7524: Encoded characters not working when using expressions for dynamic endpoints

_ Applying changes after code review
MULE-7524: Encoded characters not working when using expressions for dynamic endpoints

_ Adding missing config change