md-select cannot be placed inside md-input-container, hence labels position are not same as in an md-input

[Masber]

Bug, feature request, or proposal:

Bug

What is the expected behavior?

material breaks rendering the form if contains an md-select inside an md-input-container
This code will print the label on top of the md-input

    <md-input-container>
            <label for="firstName">First Name</label>
            <input mdInput id="firstName" name="firstName" autocomplete="off"
                   formControlName="firstName">

            <md-error *ngIf="formErrors.firstName">
              {{ formErrors.firstName }}
            </md-error>
    </md-input-container>

md-select element behaves differently as it can't be placed inside a md-input-container (labels showed on the left side of the select element instead ob being on top).

What is the current behavior?

labels assigned to an md-select behaves differently as the ones assigned to an md-input inside an md-input-container

What are the steps to reproduce?

Providing a Plunker (or similar) is the best way to get the team to see your issue.
Plunker template: http://embed.plnkr.co/sCUAxJWox2BG1p5hD1fU/

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

improve material 2 functionality

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

@angular/cli: 1.3.1
node: 7.9.0
os: win32 x64
@angular/animations: 4.3.5
@angular/cdk: 2.0.0-beta.8
@angular/common: 4.3.5
@angular/compiler: 4.3.5
@angular/core: 4.3.5
@angular/forms: 4.3.5
@angular/http: 4.3.5
@angular/material: 2.0.0-beta.8
@angular/platform-browser: 4.3.5
@angular/platform-browser-dynamic: 4.3.5
@angular/router: 4.3.5
@angular/cli: 1.3.1
@angular/compiler-cli: 4.3.5
@angular/language-service: 4.3.5

Is there anything else we should know?

[willshowell]

There is active work to be able to use the select inside the input-container. Since the last release, the input container has been renamed to md-form-field and #6488 is aligning the select's behavior/styles with the input.

[jelbourn]

What @willshowell said. We're tracking this via #2124

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