Moderate: python security and bug fix update (Oracle Linux 7)

[2.7.5-76.0.1]
- Add Oracle Linux distribution in platform.py [orabug 20812544]

[2.7.5-76]
- Remove an unversioned obsoletes tag
Resolves: rhbz#1627059

[2.7.5-75]
- Provide the /usr/libexec/platform-python symlink to the main binary
Resolves: rhbz#1599159

[2.7.5-74]
- Fix OSERROR 17 due to _multiprocessing/semaphore.c assuming
a one-to-one Pid -> process mapping
Resolves: rhbz#1579432

[2.7.5-73]
- Remove 3DS cipher to mitigate CVE-2016-2183 (sweet32).
Resolves: rhbz#1581901

[2.7.5-72]
- Fix CVE-2018-1060 and CVE-2018-1061
Resolves: rhbz#1563454 and rhbz#1549192
- Provide python2-libs from the python-libs subpackage
Resolves: rhbz#1557460

[2.7.5-71]
- Limit the number of CPU cores when building the package on power architectures
Resolves: rhbz#1568974

[2.7.5-70]
- Do not send IP addresses in SNI TLS extension
Resolves: rhbz#1555314