Bye bye openapi (#1081)

* add DateTime sans mgo

* change all uses of strfmt.DateTime to common.DateTime, remove test strfmt usage

* remove api tests, system-test dep on api test

multiple reasons to remove the api tests:

* awkward dependency with fn_go meant generating bindings on a branched fn to
vendor those to test new stuff. this is at a minimum not at all intuitive,
worth it, nor a fun way to spend the finite amount of time we have to live.
* api tests only tested a subset of functionality that the server/ api tests
already test, and we risk having tests where one tests some thing and the
other doesn't. let's not. we have too many test suites as it is, and these
pretty much only test that we updated the fn_go bindings, which is actually a
hassle as noted above and the cli will pretty quickly figure out anyway.
* fn_go relies on openapi, which relies on mgo, which is deprecated and we'd
like to remove as a dependency. openapi is a _huge_ dep built in a NIH
fashion, that cannot simply remove the mgo dep as users may be using it.
we've now stolen their date time and otherwise killed usage of it in fn core,
for fn_go it still exists but that's less of a problem.

* update deps

removals:

* easyjson
* mgo
* go-openapi
* mapstructure
* fn_go
* purell
* go-validator

also, had to lock docker. we shouldn't use docker on master anyway, they
strongly advise against that. had no luck with latest version rev, so i locked
it to what we were using before. until next time.

the rest is just playing dep roulette, those end up removing a ton tho

* fix exec test to work

* account for john le cache

vendor/google.golang.org/api/iam/v1/iam-gen.go

@@ -1,4 +1,4 @@
-// Package iam provides access to the Google Identity and Access Management (IAM) API.
+// Package iam provides access to the Identity and Access Management (IAM) API.
 //
 // See https://cloud.google.com/iam/
 //
@@ -240,7 +240,6 @@ type RolesService struct {
 type AuditConfig struct {
 	// AuditLogConfigs: The configuration for logging of each type of
 	// permission.
-	// Next ID: 4
 	AuditLogConfigs []*AuditLogConfig `json:"auditLogConfigs,omitempty"`
 
 	// Service: Specifies a service that will be enabled for audit
@@ -412,7 +411,7 @@ type Binding struct {
 	//
 	// * `user:{emailid}`: An email address that represents a specific
 	// Google
-	//    account. For example, `alice@gmail.com` or `joe@example.com`.
+	//    account. For example, `alice@gmail.com` .
 	//
 	//
 	// * `serviceAccount:{emailid}`: An email address that represents a
@@ -825,7 +824,7 @@ func (s *Permission) MarshalJSON() ([]byte, error) {
 // specify access control policies for Cloud Platform resources.
 //
 //
-// A `Policy` consists of a list of `bindings`. A `Binding` binds a list
+// A `Policy` consists of a list of `bindings`. A `binding` binds a list
 // of
 // `members` to a `role`, where the members can be user accounts, Google
 // groups,
@@ -833,7 +832,7 @@ func (s *Permission) MarshalJSON() ([]byte, error) {
 // permissions
 // defined by IAM.
 //
-// **Example**
+// **JSON Example**
 //
 //     {
 //       "bindings": [
@@ -844,7 +843,7 @@ func (s *Permission) MarshalJSON() ([]byte, error) {
 //             "group:admins@example.com",
 //             "domain:google.com",
 //
-// "serviceAccount:my-other-app@appspot.gserviceaccount.com",
+// "serviceAccount:my-other-app@appspot.gserviceaccount.com"
 //           ]
 //         },
 //         {
@@ -854,6 +853,20 @@ func (s *Permission) MarshalJSON() ([]byte, error) {
 //       ]
 //     }
 //
+// **YAML Example**
+//
+//     bindings:
+//     - members:
+//       - user:mike@example.com
+//       - group:admins@example.com
+//       - domain:google.com
+//       - serviceAccount:my-other-app@appspot.gserviceaccount.com
+//       role: roles/owner
+//     - members:
+//       - user:sean@example.com
+//       role: roles/viewer
+//
+//
 // For a description of IAM and its features, see the
 // [IAM developer's guide](https://cloud.google.com/iam/docs).
 type Policy struct {