Unable to set disable on md-input when using model driven forms

[ccpony]

Bug, feature request, or proposal: Bug

What is the expected behavior?

What is the current behavior?

Unable to initialize disabled state on when using ng2 model-driven forms

What are the steps to reproduce?

...
let account_idCtrl = this.formBuilder.control({
value: '',
disabled: true <=== doesn't work. Control is not disabled.
}, Validators.required);
let account_nameCtrl = this.formBuilder.control({
value:''
})

  this.myForm = this.formBuilder.group({
      account_id: account_idCtrl,
      account_name: account_nameCtrl
  })

...

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What is the use-case or motivation for changing an existing behavior?

Which versions of Angular, Material, OS, browsers are affected?

@angular 2.0.1
material: experimental
angular-cli: 1.0.0.0-beta.16

Is there anything else we should know?

[RoxKilly]

May be duplicate of #1171

[jelbourn]

Dupe of #1171

[angular-automatic-lock-bot]

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