linstor: do not use the same static ApiClient for all calls (#9326)

The client.setBasePath() would overwrite the Linstor controller IP/host
for all current client users. This is basically a race condition
that triggered as soon as you had configured 2 different primary storages
with different Linstor controllers.

Author: rp-

plugins/storage/volume/linstor/src/main/java/org/apache/cloudstack/storage/datastore/util/LinstorUtil.java

@@ -18,7 +18,6 @@
 
 import com.linbit.linstor.api.ApiClient;
 import com.linbit.linstor.api.ApiException;
-import com.linbit.linstor.api.Configuration;
 import com.linbit.linstor.api.DevelopersApi;
 import com.linbit.linstor.api.model.ApiCallRc;
 import com.linbit.linstor.api.model.ApiCallRcList;
@@ -46,7 +45,7 @@ public class LinstorUtil {
     public static final String CLUSTER_DEFAULT_MAX_IOPS = "clusterDefaultMaxIops";
 
     public static DevelopersApi getLinstorAPI(String linstorUrl) {
-        ApiClient client = Configuration.getDefaultApiClient();
+        ApiClient client = new ApiClient();
         client.setBasePath(linstorUrl);
         return new DevelopersApi(client);
     }