Errors on instance modification

[athak]

Lately, when trying to modify an instance's cores and/or memory, we get a lot of these types of errors:

* softlayer_virtual_guest.instance: Couldn't upgrade virtual guest: SoftLayer_Exception_Order_Item_Invalid: Invalid price 32 GB (Dedicated Host) (200365) provided on the order container. Please select a dedicated instance RAM price to order a dedicated instance. (HTTP 500)

The instances are not on dedicated hosts, dedicated_acct_host_only is set to false.

If change the instances' resources in the control panel and then running terraform plan shows that nothing needs to be changed as expected.

[athak]

This is becoming increasingly more frequent. We are now almost unable to modify any existing instances via terraform, having to resort to the control panel.

We see here https://softlayer.github.io/release_notes/2017/20170803/ that a change was made to the API to expose the SoftLayer_Virtual_DedicatedHost Service. Could it be related? The timing of when these issues started certainly matches. Is the PR in #170 related?