real test of sensor discovery
Merge branch 'ait-develop' of https://github.com/OpenIotOrg/openiot into ait-develop

Conflicts:
	modules/scheduler/scheduler.core/src/main/java/org/openiot/scheduler/core/api/impl/DiscoverSensorsImpl.java
	modules/scheduler/scheduler.core/src/main/java/org/openiot/scheduler/core/api/impl/RegisterServiceImpl.java
	modules/scheduler/scheduler.core/src/main/java/org/openiot/scheduler/core/utils/sparql/SesameSPARQLClient.java
	utils/openIotCommons/src/main/resources/OSDSpec/OSDSpec_SimpleSample1.xml