frosted bug for Python >= 3.5

[M. Gronle]

The syntax checker module frosted has a bug for Python 3.5 if args and *kwds arguments are used in python scripts. This is, since the AST module of Python changed a little bit.

In order to not being bothered by this bug, execution errors of frosted are only displayed in debug mode of itom (pythonEngine::pythonSyntaxCheck). This might change if frosted is fixed.

Related issue: https://github.com/timothycrosley/frosted/issues/59

Related information: http://greentreesnakes.readthedocs.io/en/latest/nodes.html#Call

[M. Gronle]

Reported to frosted and placed a pull request under https://github.com/timothycrosley/frosted/pull/62 .

A corrected python package (whl) can be downloaded from https://sourceforge.net/projects/itom/files/all-in-one-build-setup/Optional-3rdParty/frosted-1.4.1.post2-py2.py3-none-any.whl/download .

[M. Gronle]

replace frosted by better maintained component

[M. Gronle]

frosted can be replace by pyflakes. frosted is now officially deprecated and recommends the usage of pyflakes. frosted was a fork of pyflakes, therefore the syntax is the same for both packages.

[M. Gronle]

the itom syntax check now works both with the python packages 'pyflakes' and 'frosted'. pyflakes is preferred, since frosted is not maintained any more. This commit fixes issue #52

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