Subworkflows in compilation (#66)

In order to make register workflows with subworkflows, they need to be passed along to the compiler.

* Also updated the logging for a minor log line that was making it hard for me to debug an issue earlier today.

Please see flyteorg/flyte#139 for related PRs.

go.mod

@@ -5,43 +5,39 @@ go 1.13
 require (
 	github.com/NYTimes/gizmo v1.3.5
 	github.com/Selvatico/go-mocket v1.0.7
-	github.com/aws/aws-sdk-go v1.28.9
+	github.com/aws/aws-sdk-go v1.29.20
 	github.com/benbjohnson/clock v1.0.0
 	github.com/bradfitz/gomemcache v0.0.0-20190913173617-a41fca850d0b // indirect
-	github.com/coreos/go-oidc v2.1.0+incompatible
+	github.com/coreos/go-oidc v2.2.1+incompatible
 	github.com/evanphx/json-patch v4.5.0+incompatible
 	github.com/gogo/protobuf v1.3.1
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/golang/protobuf v1.3.2
+	github.com/golang/protobuf v1.3.4
 	github.com/gorilla/handlers v1.4.2
 	github.com/gorilla/securecookie v1.1.1
-	github.com/graymeta/stow v0.2.4
-	github.com/grpc-ecosystem/go-grpc-middleware v1.1.0
+	github.com/graymeta/stow v0.2.5
+	github.com/grpc-ecosystem/go-grpc-middleware v1.2.0
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
-	github.com/grpc-ecosystem/grpc-gateway v1.12.2
-	github.com/imdario/mergo v0.3.8 // indirect
+	github.com/grpc-ecosystem/grpc-gateway v1.14.2
 	github.com/jinzhu/gorm v1.9.12
-	github.com/json-iterator/go v1.1.9 // indirect
 	github.com/kelseyhightower/envconfig v1.4.0 // indirect
 	github.com/lib/pq v1.3.0
-	github.com/lyft/flyteidl v0.17.3
-	github.com/lyft/flytepropeller v0.1.30
-	github.com/lyft/flytestdlib v0.3.0
+	github.com/lyft/flyteidl v0.17.8
+	github.com/lyft/flytepropeller v0.2.13
+	github.com/lyft/flytestdlib v0.3.2
 	github.com/magiconair/properties v1.8.1
 	github.com/mitchellh/mapstructure v1.1.2
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.3.0
-	github.com/spf13/cobra v0.0.5
+	github.com/prometheus/client_golang v1.5.0
+	github.com/spf13/cobra v0.0.6
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.4.0
+	github.com/stretchr/testify v1.5.1
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
-	google.golang.org/api v0.15.1-0.20200117000758-b4cd77d6a56c // indirect
-	google.golang.org/grpc v1.26.0
+	google.golang.org/grpc v1.27.1
 	gopkg.in/gormigrate.v1 v1.6.0
-	k8s.io/apimachinery v0.17.2
+	k8s.io/apimachinery v0.17.3
 	k8s.io/client-go v11.0.0+incompatible
-	k8s.io/utils v0.0.0-20200109141947-94aeca20bf09 // indirect
-	sigs.k8s.io/controller-runtime v0.3.1-0.20191029211253-40070e2a1958
+	sigs.k8s.io/controller-runtime v0.5.0
 )
 
 // Pin the version of client-go to something that's compatible with katrogan's fork of api and apimachinery
@@ -50,6 +46,8 @@ require (
 // and it will be replaced with the 'sha' variant of the version
 
 replace (
+	github.com/GoogleCloudPlatform/spark-on-k8s-operator => github.com/lyft/spark-on-k8s-operator v0.1.3
+	github.com/googleapis/gnostic => github.com/googleapis/gnostic v0.3.1
 	k8s.io/api => github.com/lyft/api v0.0.0-20191031200350-b49a72c274e0
 	k8s.io/apimachinery => github.com/lyft/apimachinery v0.0.0-20191031200210-047e3ea32d7f
 	k8s.io/client-go => k8s.io/client-go v0.0.0-20191016111102-bec269661e48