as_dict() may not work if Process acquires new names

[giampaolo]

Internally, Process.as_dict uses dir() builtin in order to fetch all attribute/method names of the Process class in order to return their value as a dict. Unfortunately this means that if the user attaches a new name to the Process instance that will be returned as well:

import psutil
p = psutil.Process()
p.foo = '1'
print 'foo' in p.as_dict()

Even worse, if the new name refers to a callable object, that will be called. The solution is to execute dir(Process) at import time, store the names in a global variable and have as_dict rely on it.

[giampaolo]

Fixed in d1adc72f