fix scheme panic: azurerm_storage_account datasource

[katbyte]

fix schema panic:

Test ended in panic.

------- Stdout: -------
=== RUN   TestAccDataSourceAzureRMStorageAccount_basic
=== PAUSE TestAccDataSourceAzureRMStorageAccount_basic
=== CONT  TestAccDataSourceAzureRMStorageAccount_basic

------- Stderr: -------
panic: Invalid address to set: []string{"account_type"}

goroutine 675 [running]:
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema.(*ResourceData).Set(0xc420215c00, 0x240c883, 0xc, 0x20ae460, 0xc42054d480, 0x0, 0x0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema/resource_data.go:191 +0x237
github.com/terraform-providers/terraform-provider-azurerm/azurerm.dataSourceArmStorageAccountRead(0xc420215c00, 0x23cc8e0, 0xc4206b6000, 0xc420215c00, 0x0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/azurerm/data_source_storage_account.go:197 +0x161d
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema.(*Resource).ReadDataApply(0xc4202c90a0, 0xc4206fafa0, 0x23cc8e0, 0xc4206b6000, 0xc4202938b0, 0xc420e07501, 0xc4203131d0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema/resource.go:290 +0x88
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema.(*Provider).ReadDataApply(0xc4203d21c0, 0xc420212320, 0xc4206fafa0, 0x0, 0x30, 0xc420c80000)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/helper/schema/provider.go:426 +0x9a
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.(*EvalReadDataApply).Eval(0xc4206faa60, 0x2741bc0, 0xc420890680, 0x2, 0x2, 0x2402b44, 0x4)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/eval_read_data.go:122 +0xfe
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.EvalRaw(0x2708420, 0xc4206faa60, 0x2741bc0, 0xc420890680, 0x0, 0x0, 0x0, 0x0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/eval.go:53 +0x156
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.(*EvalSequence).Eval(0xc4206faaa0, 0x2741bc0, 0xc420890680, 0x2, 0x2, 0x2402b44, 0x4)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/eval_sequence.go:14 +0x7a
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.EvalRaw(0x2708520, 0xc4206faaa0, 0x2741bc0, 0xc420890680, 0x212a320, 0x38afac5, 0x20b0e60, 0xc4203b38f0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/eval.go:53 +0x156
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.Eval(0x2708520, 0xc4206faaa0, 0x2741bc0, 0xc420890680, 0xc4206faaa0, 0x2708520, 0xc4206faaa0, 0xc420860be0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/eval.go:34 +0x4d
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform.(*Graph).walk.func1(0x2352d40, 0xc420716870, 0x0, 0x0)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/terraform/graph.go:126 +0xc26
github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/dag.(*Walker).walkVertex(0xc420215110, 0x2352d40, 0xc420716870, 0xc420de0640)
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/dag/walk.go:387 +0x3a0
created by github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/dag.(*Walker).Update
	/opt/teamcity-agent/work/458e5e4800bd94f6/src/github.com/terraform-providers/terraform-provider-azurerm/vendor/github.com/hashicorp/terraform/dag/walk.go:310 +0x1248

[katbyte]

tests:

[18:53:44] kt@snowbook:~/hashi/..3../terraform-providers/terraform-provider-azurerm▸schema_panic/storage$ testazure TestAccDataSourceAzureRMStorageAccount_basic
==> Fixing source code with gofmt...
gofmt -s -w ./azurerm
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./azurerm -v -test.run=TestAccDataSourceAzureRMStorageAccount_basic -timeout 180m -ldflags="-X=github.com/terraform-providers/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccDataSourceAzureRMStorageAccount_basic
=== PAUSE TestAccDataSourceAzureRMStorageAccount_basic
=== CONT  TestAccDataSourceAzureRMStorageAccount_basic
--- PASS: TestAccDataSourceAzureRMStorageAccount_basic (125.97s)
PASS
ok  	github.com/terraform-providers/terraform-provider-azurerm/azurerm	127.864s

[tombuildsstuff]

LGTM 👍

[ghost]

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