Correct default purity.

Author: anthony-tuininga

src/oracledb/impl/thin/messages/auth.pyx

@@ -272,9 +272,9 @@ cdef class AuthMessage(Message):
         if description.purity == PURITY_DEFAULT \
                 and self.conn_impl._drcp_enabled:
             if self.conn_impl._is_pooled:
-                self.purity = PURITY_NEW
-            else:
                 self.purity = PURITY_SELF
+            else:
+                self.purity = PURITY_NEW
         else:
             self.purity = description.purity