add network 2019-02-01 to Go SDK (#5735)

Author: jhendrixMSFT

specification/network/resource-manager/readme.go.md

@@ -13,6 +13,7 @@ go:
 
 ``` yaml $(go) && $(multiapi)
 batch:
+  - tag: package-2019-02
   - tag: package-2018-12
   - tag: package-2018-11
   - tag: package-2018-10
@@ -36,6 +37,15 @@ batch:
   - tag: package-2015-05-preview
 ```
 
+### Tag: package-2019-02 and go
+
+These settings apply only when `--tag=package-2019-02 --go` is specified on the command line.
+Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
+
+``` yaml $(tag) == 'package-2019-02' && $(go)
+output-folder: $(go-sdk-folder)/services/$(namespace)/mgmt/2019-02-01/$(namespace)
+```
+
 ### Tag: package-2018-12 and go
 
 These settings apply only when `--tag=package-2018-12 --go` is specified on the command line.