Wording borrowed from the website docs.

Read more default envvars for GCP

* provider/aws: Add more Randomization to DB Parameter Group Tests, to avoid collisions

* provider/aws: Add more randomization to Autoscaling group tests

- Closes #5874
- Fixes #5872

This plays more nicely with mobile email clients.

Move GCP projece attribute onto resources, inherit from provider

Add project parameter to cloudstack_port_forward.

Added the ability to set the "privacy" of a github_team resource so all teams won't automatically set to private.

* Added the privacy argument to github_team

* Refactored parameter validation to be general for any argument

* Updated testing

deps: Update github.com/fsouza/go-dockerclient

This introduces the fix in fsouza/go-dockerclient#497, which in turn
fixes fsouza/go-dockerclient#296. This allows Terraform to build fully
on OpenBSD.

This commit also normalizes the format we display attributes.

This is the first step in removing the config dependency on "project".
This change is backwards-compatible because the value for this new
attribute defaults to the value from the provider.

The current implementation returns error as the first parameter, 
but it is usually the last parameter.

command: delete unused class

Use schema funcs for reading values from the env

Remove TF_QUICKDEV environment variable

- Add parameter to resource.
- Modify read operation to pass in projectid if defined.

This environment variable doesn't seem to be used, the last usage was removed in 6fe27036.

* provider/aws: test empty plan with sns_topic policy with random order

If we setup a sns_topic policy with a policy with a different order
to the one set by the AWS API, terraform plan will be not empty between
runs.

* provider/aws: normalize json policy for sns topic

For the policy attribute of the resource aws_sns_topic,  AWS returns the policy
in JSON format with the fields in a different order.
If we store and compare the values without normalizing, terraform
will unnecesary trigger and update of the resource.

To avoid that, we must add a normalization function in the StateFunc of
the policy attribute and also when we read the attribute from AWS.

On creating CloudWatch metric alarms, I need to get the HealthCheckId dimension. Reference would be useful.

```
    dimensions {
        "HealthCheckId" = "${aws_route53_health_check.foo.id}"
    }
```

provider/openstack: Allow subnets with no gateway

This commit adds a no_gateway attribute. When set, the subnet will
not have a gateway. This is different than not specifying a
gateway_ip since that will cause a default gateway of .1 to be used.
This behavior mirrors the OpenStack Neutron command-line tool.

Fixes #6031

vendor: Updating gophercloud for openstack