Create a --kernel=adaptive-jit option, make it the default

hybrid_server/classes/mvkcontroller.xml

@@ -15,7 +15,7 @@
             self.mvk = ModelverseKernel(self.root)
 
             # Parse kernel-related options
-            default_kernel_type = 'fast-jit'
+            default_kernel_type = 'adaptive-jit'
             kernel_opts = [default_kernel_type]
             for parameter in params:
                 if parameter.startswith('--kernel='):
@@ -40,6 +40,8 @@
                     self.mvk.jit.set_function_body_compiler(jit.compile_function_body_fast)
                 elif opt == 'baseline-jit':
                     self.mvk.jit.set_function_body_compiler(jit.compile_function_body_baseline)
+                elif opt == 'adaptive-jit':
+                    self.mvk.jit.set_function_body_compiler(jit.compile_function_body_adaptive)
                 else:
                     print("warning: unknown kernel option '%s'." % opt)