[refactor] freeze SSLContext when everything okay

Author: kares

src/main/java/org/jruby/ext/openssl/SSLContext.java

@@ -339,11 +339,6 @@ public IRubyObject setup(final ThreadContext context) {
 
         if ( isFrozen() ) return runtime.getNil();
 
-        synchronized(this) {
-            if ( isFrozen() ) return runtime.getNil();
-            this.freeze(context);
-        }
-
         final X509Store certStore = getCertStore();
 
         // TODO: handle tmp_dh_callback :
@@ -513,6 +508,8 @@ public IRubyObject setup(final ThreadContext context) {
             throw newSSLError(runtime, e);
         }
 
+        this.freeze(context);
+
         return runtime.getTrue();
     }