Created injectable Sessions

Conflicts:
	fcrepo-http-api/src/main/java/org/fcrepo/api/FedoraChildren.java
	fcrepo-http-api/src/test/java/org/fcrepo/api/FedoraChildrenTest.java
	fcrepo-http-api/src/test/java/org/fcrepo/integration/api/AbstractResourceIT.java
	fcrepo-http-api/src/test/resources/spring-test/rest.xml
	fcrepo-http-api/src/test/resources/spring-test/test-container.xml
	fcrepo-http-commons/pom.xml
	fcrepo-http-commons/src/test/java/org/fcrepo/test/util/TestHelpers.java
	fcrepo-webapp/src/main/resources/spring/rest.xml
	fcrepo-webapp/src/test/resources/spring-test/rest.xml