Fix openhab-core-auth-oauth2client feature installation (openhab#4012)

Karaf does not automatically install the feature after `dependency="true"` was added in openhab#3814.

Signed-off-by: Wouter Born <github@maindrain.net>
Signed-off-by: Ciprian Pascu <contact@ciprianpascu.ro>

features/karaf/openhab-core/src/main/feature/feature.xml

@@ -494,7 +494,7 @@
 
 	<feature name="openhab-transport-http" description="HTTP Transport" version="${project.version}">
 		<capability>openhab.tp;feature=httpclient;version=${jetty.version}</capability>
-		<feature dependency="true">openhab-core-auth-oauth2client</feature>
+		<feature>openhab-core-auth-oauth2client</feature>
 		<feature dependency="true">pax-web-jetty-extras</feature>
 		<feature dependency="true">pax-web-jetty-websockets</feature>
 	</feature>