Merge "Issue #1744 actually fix deadlock this time" into omaha_13.3.1

Former-commit-id: 1754861897 [formerly 7eafcb1e677fafadc039a5106f296dbee1245136]
Former-commit-id: c50e1cbe1c

edexOsgi/com.raytheon.uf.common.serialization/src/com/raytheon/uf/common/serialization/SerializationCache.java

@@ -106,7 +106,7 @@ public class SerializationCache {
         // and will block other threads, meanwhile deeper inside create()
         // it needs to obtain a lock on the classloader which another thread
         // might already have
-        synchronized (SerializationCache.class) {
+        synchronized (SerializationCache.class.getClassLoader()) {
             bm = generator.create();
         }
         generator.setBean(null);