Lock VMware by VM instead of globally

Ref https://github.com/GNS3/gns3-gui/issues/1632

gns3server/compute/vmware/__init__.py

@@ -47,7 +47,6 @@ class VMware(BaseManager):
     def __init__(self):
 
         super().__init__()
-        self._execute_lock = asyncio.Lock()
         self._vmware_inventory_lock = asyncio.Lock()
         self._vmrun_path = None
         self._host_type = None
@@ -371,7 +370,6 @@ class VMware(BaseManager):
 
     @asyncio.coroutine
     def _execute(self, subcommand, args, timeout=120):
-        with (yield from self._execute_lock):
         if self.host_type is None:
             yield from self.check_vmware_version()
 
@@ -413,7 +411,6 @@ class VMware(BaseManager):
         :param required_version: required vmrun version number
         """
 
-        with (yield from self._execute_lock):
         vmrun_path = self.vmrun_path
         if not vmrun_path:
             vmrun_path = self.find_vmrun()

gns3server/compute/vmware/vmware_vm.py

@@ -27,7 +27,7 @@ import tempfile
 
 from gns3server.utils.telnet_server import TelnetServer
 from gns3server.utils.interfaces import interfaces
-from gns3server.utils.asyncio import wait_for_file_creation, wait_for_named_pipe_creation
+from gns3server.utils.asyncio import wait_for_file_creation, wait_for_named_pipe_creation, locked_coroutine
 from collections import OrderedDict
 from .vmware_error import VMwareError
 from ..nios.nio_udp import NIOUDP
@@ -99,7 +99,7 @@ class VMwareVM(BaseNode):
 
         return self._vmnets
 
-    @asyncio.coroutine
+    @locked_coroutine
     def _control_vm(self, subcommand, *additional_args):
 
         args = [self._vmx_path]