Added README for running integration tests

apps/tests/integration/README.md

@@ -0,0 +1,21 @@
+# Go Integration Test
+
+This guide explains how to:
+
+1. Download a certificate from [link](https://ms.portal.azure.com/#@microsoft.onmicrosoft.com/asset/Microsoft_Azure_KeyVault/Certificate/https://msidlabs.vault.azure.net/certificates/LabAuth).
+2. Download the `.pex/.pem` format
+3. Convert the `.cert` file to `.pem` file.
+4. Execute Go integration tests.
+
+## Prerequisites
+
+- Run `openssl pkcs12 -in <path to the cert>/cert.pfx -out <Go source folder>/cert.pem -nodes -passin pass:''`
+- It should be in the root folder of the `microsoft-authentication-library-for-go`
+
+## Steps
+
+### 1. Running the tests
+
+```bash
+go test -race ./apps/tests/integration/
+```