Hardware Info should be optional

The following brings in the gomaasapi dependency that allows the
hardware info attribute to be optional. See the gomaasapi dependency for
more information[1].

  1. juju/gomaasapi#99

go.mod

@@ -61,7 +61,7 @@ require (
 	github.com/juju/featureflag v1.0.0
 	github.com/juju/gnuflag v1.0.0
 	github.com/juju/gojsonschema v1.0.0
-	github.com/juju/gomaasapi/v2 v2.0.1
+	github.com/juju/gomaasapi/v2 v2.0.2
 	github.com/juju/http/v2 v2.0.0
 	github.com/juju/idmclient/v2 v2.0.0
 	github.com/juju/jsonschema v1.0.0

go.sum

@@ -538,8 +538,8 @@ github.com/juju/gojsonreference v0.0.0-20150204194633-f0d24ac5ee33 h1:huRsqE0iXm
 github.com/juju/gojsonreference v0.0.0-20150204194633-f0d24ac5ee33/go.mod h1:UxUZdlQkjnbl3YoCZT1y5uxmvG2KMwqgffBFccD7qHI=
 github.com/juju/gojsonschema v1.0.0 h1:v0hVxinRWko/SwRYCZ99fBH20Q1JtDqKtplcovXewt0=
 github.com/juju/gojsonschema v1.0.0/go.mod h1:w3BDUH3gGgrcrAyvEbBy3lNb1vmdqG31UMn3njL8oGc=
-github.com/juju/gomaasapi/v2 v2.0.1 h1:rulAepQ48AIdSLlW3Dk6bgdVyppycfap3RlYHCdKfpM=
-github.com/juju/gomaasapi/v2 v2.0.1/go.mod h1:ZsohFbU4xShV1aSQYQ21hR1lKj7naNGY0SPuyelcUmk=
+github.com/juju/gomaasapi/v2 v2.0.2 h1:0u3G5iK3+1+cLZjvG90NR6FID4PAMRi/Mk2JrICF3pU=
+github.com/juju/gomaasapi/v2 v2.0.2/go.mod h1:ZsohFbU4xShV1aSQYQ21hR1lKj7naNGY0SPuyelcUmk=
 github.com/juju/gosigma v1.0.0 h1:zZSeVNMHWtwQLewEzz+9TDh+1n+l4Z3Gsz6Wb9qEtko=
 github.com/juju/gosigma v1.0.0/go.mod h1:OPBu48GcIJ30kNTA1cm+VbZb6GkQ6vthnr5v6NJ49eM=
 github.com/juju/http/v2 v2.0.0 h1:xexT4KO4jY0UEkhLZPwQGaEGCfgWWjw3jBPrLRumhKI=