Fix refresh token mecanism.

frontend/src/app/core/interceptor/jwt.interceptor.ts

@@ -49,6 +49,7 @@ export class JwtInterceptor implements HttpInterceptor {
                 this.userRestService.refreshToken(refreshTokenRequest)
                     .then(refreshTokenResponse => {
                         this.authenticationService.authenticate(refreshTokenResponse.accessToken, refreshTokenResponse.refreshToken);
+                        this.refreshTokenSubject.next(refreshTokenResponse.accessToken);
                     })
                     .catch(() => {
                         return this.handleNoRefreshToken(initialError);

frontend/src/app/core/service/authentication.service.ts

@@ -29,16 +29,7 @@ export class AuthenticationService {
     }
     
     isAuthenticated(): boolean {
-        let result = false;
-
-        const userDetails = this.extractUserDetails();
-        
-        if (userDetails) {
-            const authenticationExpiration = new Date(userDetails.exp * 1000);
-            result = authenticationExpiration > new Date();
-        }
-
-        return result;
+        return !!localStorage.getItem(JWT_PARAM);
     }
 
     getAuthenticatedUser(): User | undefined {