Re #10119. Renaming f20 spec file to be the unified one.
Re #10119. Preparing to test resulting spec on copr.
Re #10119. Adding conflict with ipython>=2.0
Re #10119. Adding missing requirement for RHEL6.
Merge pull request #34 from mantidproject/feature/10119_mantid_dev_spec

Consolidate the mantid developer spec files