Refactor tenancy classes (#1972)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-security-core/pom.xml

@@ -35,10 +35,6 @@
             <groupId>org.springframework.security</groupId>
             <artifactId>spring-security-oauth2-core</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.springframework.security</groupId>
-            <artifactId>spring-security-config</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.security</groupId>
             <artifactId>spring-security-web</artifactId>