python security and bug fix update

[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