fix: make openFeatureProvider an instance field instead of static (#187)

Author: jonathannorris

src/main/java/com/devcycle/sdk/server/local/api/DevCycleLocalClient.java

@@ -325,21 +325,17 @@ public void clearHooks() {
         this.evalHooksRunner.clearHooks();
     }
 
-    private static DevCycleProvider openFeatureProvider = null;
+    private DevCycleProvider openFeatureProvider;
 
     /**
      * @return the OpenFeature provider for this client.
      */
     @Override
-    public FeatureProvider getOpenFeatureProvider() {
+    public synchronized FeatureProvider getOpenFeatureProvider() {
+        PlatformData platformData = PlatformData.builder().sdkPlatform("java-of").build();
+        localBucketing.setPlatformData(platformData.toString());
         if (openFeatureProvider == null) {
-            synchronized (DevCycleLocalClient.class) {
-                if (openFeatureProvider == null) {
-                    openFeatureProvider = new DevCycleProvider(this);
-                }
-                PlatformData platformData = PlatformData.builder().sdkPlatform("java-of").build();
-                localBucketing.setPlatformData(platformData.toString());
-            }
+            openFeatureProvider = new DevCycleProvider(this);
         }
         return openFeatureProvider;
     }