Removed connect/disconnect in device command and replace with simple BlockIo readblocks to probe for media change. This relies on ReinstallProtocolInterface() calls in the BlockIo drivers to make the filesystems reload. 
Removed connect/disconnect in device command and replace with simple BlockIo readblocks to probe for media change. This relies on ReinstallProtocolInterface() calls in the BlockIo drivers to make the filesystems reload. 


git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@10468 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2