fix parsing error in p_constructor_declaration and p_interface_declaration

 def p_constructor_declaration(self, p):
      '''constructor_declaration : constructor_header method_body'''
           p[0] = ConstructorDeclaration(p[1], p[2],
           modifiers=p[1]['modifiers'],
           ....
 def p_interface_declaration(self, p):
      '''interface_declaration : interface_header interface_body'''
      p[0] = InterfaceDeclaration(p[1], modifiers=p[1]['modifiers'],
      ...

to

 def p_constructor_declaration(self, p):
      '''constructor_declaration : constructor_header method_body'''
           p[0] = ConstructorDeclaration(p[1]['name'], p[2],
           modifiers=p[1]['modifiers'],
           ....
 def p_interface_declaration(self, p):
      '''interface_declaration : interface_header interface_body'''
      p[0] = InterfaceDeclaration(p[1]['name'], modifiers=p[1]['modifiers'],
      ...
I think it's much more reasonable :)