Upgrade azure SDK to 0.9.3

We are ATM using azure SDK 0.9.0.

Azure latest release is now 0.9.3 (released in February 2016).

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Artifacts are on [maven central](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22com.microsoft.azure%22%20AND%20(a%3Aazure-serviceruntime%20OR%20a%3Aazure-servicebus%20OR%20a%3Aazure-svc-*))

Change log:

## 2016.2.18 Version 0.9.3

* Fix enum bugs in azure-svc-mgmt-websites

## 2016.1.26 Version 0.9.2

* Fix HTTP Proxy for Apache HTTP Client in Service Clients
* Key Vault: Fix KeyVaultKey to not attempt to load RSA Private Key

## 2016.1.8 Version 0.9.1

* Support HTTP Proxy
* Fix token expiration issue #557
* Service Bus: Add missing attributes: partitionKey, viaPartitionKey
* Traffic Manager: Update API version, add MinChildEndpoints for NestedEndpoints
* Media: Add support for Widevine (DRM) dynamic encryption

Closes #17042.

plugins/discovery-azure/build.gradle

@@ -23,7 +23,7 @@ esplugin {
 }
 
 versions << [
-  'azure': '0.9.0',
+  'azure': '0.9.3',
   'jersey': '1.13'
 ]
 

plugins/discovery-azure/licenses/azure-core-0.9.0.jar.sha1

@@ -1 +0,0 @@
-050719f91deceed1be1aaf87e85099a861295fa2

plugins/discovery-azure/licenses/azure-core-0.9.3.jar.sha1

@@ -0,0 +1 @@
+7fe32241b738aad0f700f4277fa998230c144ae7

plugins/discovery-azure/licenses/azure-svc-mgmt-compute-0.9.0.jar.sha1

@@ -1 +0,0 @@
-887ca8ee5564e8ba2351e6b5db2a1293a8d04674

plugins/discovery-azure/licenses/azure-svc-mgmt-compute-0.9.3.jar.sha1

@@ -0,0 +1 @@
+602d3e6f5a9f058c2439e8fdf1270cddc811b440