fix(federation): Fix protocol handling of invitations

Invitations are always stored with the protocol,
so when checking for invitations we use the original remoteServerUrl
which contains the protocol in http and https cases

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/Federation/CloudFederationProviderTalk.php

@@ -648,7 +648,7 @@ class CloudFederationProviderTalk implements ICloudFederationProvider, ISignedCl
 		}
 
 		try {
-			$invite = $this->invitationMapper->getByRemoteServerAndAccessToken($remoteServerUrl, $sharedSecret);
+			$invite = $this->invitationMapper->getByRemoteServerAndAccessToken($payload['remoteServerUrl'], $sharedSecret);
 			return $invite->getInviterCloudId();
 		} catch (DoesNotExistException) {
 		}