Updating Readme for Management operations
Updating Readme for Management operations

ManagementClient has been released and we no longer need to redirect to the separate management library.
ayeletshpigelman/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,jamestao/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,jamestao/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,stankovski/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,jamestao/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,jackmagic313/azure-sdk-for-net,hyonholee/azure-sdk-for-net,hyonholee/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,hyonholee/azure-sdk-for-net,stankovski/azure-sdk-for-net,AsrOneSdk/azure-sdk-for-net,yugangw-msft/azure-sdk-for-net,hyonholee/azure-sdk-for-net,jamestao/azure-sdk-for-net,ayeletshpigelman/azure-sdk-for-net,markcowl/azure-sdk-for-net,brjohnstmsft/azure-sdk-for-net,hyonholee/azure-sdk-for-net