python: subpackages now require same version-release for python-base

This update fixes the following issue for python:
- subpackages now require same version-release for python-base (prevents bnc#766778 and other bugs of its class caused by private APIs not being in sync)

Fixed bugs
bnc#766778
python modules requiring _Py_HashSecret don't depend on updated libpython2_7
Selected Binaries
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