Alena Prokharchyk d66e9c7b51 CLOUDSTACK-2843: Provideded an ability to turn off the synchronization being done on the CS agent side,
for number of commands participating in Vm deployment process, as parallel deployment is supported on the hypervisor side.
The behavior is controlled by global config varirables:

"execute.in.sequence.hypervisor.commands" (false by default) sets/resets the synchronization for commands:
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StartCommand
StopCommand
CreateCommand
CopyVolumeCommand

"execute.in.sequence.network.element.commands" (false by default) sets/resets the synchronization for commands:
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DhcpEntryCommand
SavePasswordCommand
UserDataCommand
VmDataCommand

As a part of the fix, increased the global lock timeout to 30 mins in several VR scripts:
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edithosts.sh
savepassword.sh
userdata.sh

to support situations when multiple concurrent calls to the script are being made.
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