Strip extra ' from field names when loading from hickle file

[grero]

No description provided.

[grero]

This illustrates the problem, and the fix

class MyObj():
    def __init__(self,b=None):
       self.b = b

a = MyObj()
setattr(a, "'setidx'", [1,2])
a.setidx # this gives an error
getattr(a, "'setidx'") # this works