client: corrected an extreme case of enviroment variable handling

src/nsi/installer/cloud_connect_from_windows.py

@@ -29,9 +29,16 @@ def connect(vm):
     vm.password -- Password used for the connection
     """
     if vm.protocol == "SSH":
-        arguments = ("-ssh -P %s -pw %s" % (vm.port, vm.password)
-                     + " %s@%s" % (vm.user, vm.host))
-        subprocess.Popen("putty.exe "+arguments, shell=True)
+        arguments = ("-ssh -P %(port)s -pw %(password)s"
+                     " %(user)s@%(host)s" % {
+                        'port': vm.port,
+                        'password': vm.password,
+                        'user': vm.user,
+                        'host': vm.host})
+        directory = os.path.dirname(os.path.abspath(__file__))
+        subprocess.Popen("%(path)s\\putty.exe %(arguments)s" % {
+            'path': directory,
+            'arguments': arguments}, shell=True)
     elif vm.protocol == "NX":
         listdir = os.path.expanduser("~\\.nx\\config\\*.nxs")
         found = False