replace local jwt with library version

- update ConfigurationController to handle hlaeja jwt instead of jwtService
- update MeasurementController to handle hlaeja jwt instead of jwtService
- add dependency for hlaeja jwt
- remove dependencies for jjwt
- remove JwtService.kt
- remove PublicKeyProvider.kt
- remove jwt key property explanation from additional-spring-configuration-metadata.json

src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -20,11 +20,6 @@
       "type": "java.lang.String",
       "description": "Application build os version."
     },
-    {
-      "name": "jwt.public-key",
-      "type": "java.lang.String",
-      "description": "Jwt public key file."
-    },
     {
       "name": "device-registry.url",
       "type": "java.lang.String",