Convert PFWScriptGenerator.py to python2
Convert PFWScriptGenerator.py to python2

BZ: 122982

As python3 is not included in android build dependancy,
PFWScriptGenerator.py could not be executed in the build process.

Convert it to python2.

Change-Id: I0e946534bde321d0a6567270b35a80ff3b38a551
Signed-off-by: Kevin Rocard <bd9a896220d78c7807307c046053ff427b594938@intel.com>
Reviewed-on: http://android.intel.com:8080/130256
Reviewed-by: Centelles, Sylvain <288429720f63c6d68421a1c2a03aafe980c6e4bc@intel.com>
Tested-by: Barthes, FabienX <07cfc97bf6dde07045dd9fe6b5c4bff90058b2fb@intel.com>
Reviewed-by: cactus <c3ee75fbaae48de2b78e493a0872d74c3ea268c4@intel.com>
Tested-by: cactus <c3ee75fbaae48de2b78e493a0872d74c3ea268c4@intel.com>

dawagner/parameter-framework,AdrienMQ/parameter-framework,geekboxzone/mmallow_external_parameter-framework,Makohoek/parameter-framework,tcahuzax/parameter-framework,dawagner/parameter-framework,krocard/parameter-framework,mgaio/parameter-framework,soaresm/parameter-framework,android-ia/hardware_intel_parameter-framework,01org/parameter-framework,wzairix/parameter-framework,clero/parameter-framework,tcahuzax/parameter-framework,miguelgaio/parameter-framework,geekboxzone/mmallow_external_parameter-framework,miguelgaio/parameter-framework,Makohoek/parameter-framework,android-ia/hardware_intel_parameter-framework,zchokri/parameter-framework,sdnnfv/parameter-framework,krocard/parameter-framework,zchokri/parameter-framework,clero/parameter-framework,AdrienMQ/parameter-framework,tcahuzax/parameter-framework,dbrageul/parameter-framework,01org/parameter-framework,mgaio/parameter-framework,sdnnfv/parameter-framework,anwarMov/parameter-framework,pafonso/parameter-framework,pafonso/parameter-framework,dbrageul/parameter-framework,android-ia/hardware_intel_parameter-framework,sdnnfv/parameter-framework,Makohoek/parameter-framework,dbrageul/parameter-framework,soaresm/parameter-framework,krocard/parameter-framework,pafonso/parameter-framework,mgaio/parameter-framework,dawagner/parameter-framework,soaresm/parameter-framework,wzairix/parameter-framework,miguelgaio/parameter-framework,zchokri/parameter-framework,anwarMov/parameter-framework,AdrienMQ/parameter-framework,geekboxzone/mmallow_external_parameter-framework,01org/parameter-framework,wzairix/parameter-framework,anwarMov/parameter-framework,clero/parameter-framework