V2.0 thrift repository migration and cleanup (#98)

* Remove unnecessary files from the thrift repository that come along with the go library.

* Updating thrift generated code to be 0.12.0 final generated code.

* Remove git.apache.org dependency in vendor folder.

* Migrating from git.apache.org/thrift.git to github.com/apache/thrift

* Upgrading dep (although it will not work now that imports are using mod format, it allows for users to easily fix this with a replacement of the import path).

* Upgrading mod dependencies for Thrift to point to github.com location of the repository.

* Bug fix for Thermos Payload generation relating to the GPU being set.

Gopkg.lock

@@ -4,7 +4,7 @@
 [[projects]]
   branch = "0.12.0"
   digest = "1:89696c38cec777120b8b1bb5e2d363d655cf2e1e7d8c851919aaa0fd576d9b86"
-  name = "git.apache.org/thrift.git"
+  name = "github.com/apache/thrift"
   packages = ["lib/go/thrift"]
   pruneopts = ""
   revision = "384647d290e2e4a55a14b1b7ef1b7e66293a2c33"
@@ -51,7 +51,7 @@
   analyzer-name = "dep"
   analyzer-version = 1
   input-imports = [
-    "git.apache.org/thrift.git/lib/go/thrift",
+    "github.com/apache/thrift/lib/go/thrift",
     "github.com/pkg/errors",
     "github.com/samuel/go-zookeeper/zk",
     "github.com/stretchr/testify/assert",