Make commerce backoffice product test case pass.

from now the test case is not passed:

Fail      Other      commerce_backoffi   21 CommerceBackofficeProductWebTestCas
    Type saved.

It seems the variation type saved, but commerce_product_type_load($type) could not return the saved type.

Here has some progress after cache reset, previous issue has been solved.
Now the issue is inline_enitty_form does not display the product sku for input:

Pass      Browser    commerce_backoffi   60 CommerceBackofficeProductWebTestCas
    GET http://nongzi/drupal7/node/add/k1ik7wtr returned 200 (10.04 KB).
Pass      Browser    commerce_backoffi   60 CommerceBackofficeProductWebTestCas
    Valid HTML found on "http://nongzi/drupal7/node/add/k1ik7wtr"
Fail      Other      commerce_backoffi   60 CommerceBackofficeProductWebTestCas
    Failed to set field field_product[und][form][sku] to vayQbd0X
Fail      Other      commerce_backoffi   60 CommerceBackofficeProductWebTestCas
    Failed to set field field_product[und][form][commerce_price][und][0][amount]
    to 8

Now the test case can be passed in my local environment.