Update azure_mgmt_policy to use ms_rest_azure ~>0.6.2

management/azure_mgmt_policy/azure_mgmt_policy.gemspec

@@ -30,5 +30,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rspec', '~> 3'
   spec.add_development_dependency 'dotenv', '~> 2'
 
-  spec.add_runtime_dependency 'ms_rest_azure', '~> 0.6.0'
+  spec.add_runtime_dependency 'ms_rest_azure', '~> 0.6.2'
 end