Doctest failure for AbsorptionCorrection

[NickDraper]

ticket http://trac.mantidproject.org/mantid/ticket/9638 was tested and merged with a doctest tailure for AbsorptionCorrection.

This is to correct it.

The error was

Document: algorithms/AbsorptionCorrection-v1
----------------------------------------- - - - 
CreateSampleWorkspace-[Notice] CreateSampleWorkspace started
CreateSampleWorkspace-[Notice] CreateSampleWorkspace successful, Duration 0.00 seconds
ConvertUnits-[Notice] ConvertUnits started
ConvertUnits-[Notice] ConvertUnits successful, Duration 0.00 seconds
**********************************************************************
File "algorithms/AbsorptionCorrection-v1.rst", line 155, in ExSimpleSpere
Failed example:
    #setup the sample shape
    sphere = '''`<sphere id="sample-sphere">`
          `<centre x="0" y="0" z="0"/>`
          `<radius val="0.1" />`
      `</sphere>`'''

    ws = CreateSampleWorkspace("Histogram",NumBanks=1,BankPixelWidth=1)
    ws = ConvertUnits(ws,"Wavelength")
    ws = Rebin(ws,Param=[1])
    CreateSampleShape(ws,sphere)
    SetSampleMaterial(ws,ChemicalFormula="V")

    #restrict the number of wavelength points to speed up the example
    wsOut = AbsorptionCorrection(ws,NumberOfWavelengthPoints=5)

    print "The created workspace has one entry for each spectra: %i" % wsOut.getNumberHistograms()
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib64/python2.6/doctest.py", line 1253, in __run
        compileflags, 1) in test.globs
      File "`<doctest ExSimpleSpere[0]>`", line 9, in `<module>`
        ws = Rebin(ws,Param=[1])
      File "/home/builder/Jenkins/workspace/develop_incremental/label/rhel6-build/build/bin/mantid/simpleapi.py", line 566, in algorithm_wrapper
        _set_properties(algm, *args, **final_keywords)
      File "/home/builder/Jenkins/workspace/develop_incremental/label/rhel6-build/build/bin/mantid/simpleapi.py", line 530, in _set_properties
        alg_object.setProperty(key, value)
    RuntimeError: Unknown property search object Param
**********************************************************************
1 items had failures:
   1 of   1 in ExSimpleSpere
1 tests in 1 items.
0 passed and 1 failed.
***Test Failed*** 1 failures.

[NickDraper]

This issue was originally trac ticket 9656