rename command exec to execute

Rename is done to have consistency as far as possible between server functions and cli commands

cccli/command/host.py

@@ -8,7 +8,7 @@ from sjrpc.core.exceptions import *
 from cccli.printer import Printer, color
 from cccli.command.command import TqlCommand
 
-class Command_exec(TqlCommand):
+class Command_execute(TqlCommand):
     '''Execute a command on the remote host'''
 
     def __init__(self, cli, argv0):