implementing ipmicheck

[Guilhermeslucas]

The powergraph now checks if ipmitool is installed.

[rpsene]

we could add a function to verify it, then reuse it when necessary:

def cmdexists(command):
"""check if a command exists"""
subp = subprocess.call("type " + command, shell=True,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
return subp == 0

This will return True or False. True if the subp output for 0 (sucess), 1 otherwise.

[rpsene]

Change request in the comments.

[Guilhermeslucas]

Changed the command to become more generic!