Update oci-go-sdk to release version v20.0.0

Author: alexng-canuck

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/hashicorp/hcl2 v0.0.0-20190618163856-0b64543c968c
 	github.com/hashicorp/terraform v0.12.4-0.20190628193153-a74738cd35fc
 	github.com/mitchellh/cli v1.0.0
-	github.com/oracle/oci-go-sdk v19.4.0+incompatible
+	github.com/oracle/oci-go-sdk v20.0.0+incompatible
 	github.com/stretchr/objx v0.1.1 // indirect
 	github.com/stretchr/testify v1.3.0
 	gopkg.in/yaml.v2 v2.2.2

go.sum

@@ -449,6 +449,8 @@ github.com/oracle/oci-go-sdk v19.3.0+incompatible h1:gslDF/UZ5bXLh3oZoEyCPolOMS3
 github.com/oracle/oci-go-sdk v19.3.0+incompatible/go.mod h1:VQb79nF8Z2cwLkLS35ukwStZIg5F66tcBccjip/j888=
 github.com/oracle/oci-go-sdk v19.4.0+incompatible h1:9C9TQzYDbylb/dlDLwr9CL3EWK9EN8GvoVcYeFkjIXA=
 github.com/oracle/oci-go-sdk v19.4.0+incompatible/go.mod h1:VQb79nF8Z2cwLkLS35ukwStZIg5F66tcBccjip/j888=
+github.com/oracle/oci-go-sdk v20.0.0+incompatible h1:PdKuaDT0DKwG7YMDpwjqsogpLhXt4z7Uxdabssvaucc=
+github.com/oracle/oci-go-sdk v20.0.0+incompatible/go.mod h1:VQb79nF8Z2cwLkLS35ukwStZIg5F66tcBccjip/j888=
 github.com/packer-community/winrmcp v0.0.0-20180102160824-81144009af58 h1:m3CEgv3ah1Rhy82L+c0QG/U3VyY1UsvsIdkh0/rU97Y=
 github.com/packer-community/winrmcp v0.0.0-20180102160824-81144009af58/go.mod h1:f6Izs6JvFTdnRbziASagjZ2vmf55NSIkC/weStxCHqk=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c h1:Lgl0gzECD8GnQ5QCWA8o6BtfL6mDH5rQgM4/fX3avOs=