libreoffice security update

[1:5.0.6.2-15.0.1]

• Replaced RedHat colors with Oracle colors, and the filename redhat.soc with oracle.soc in specfile
• Build with --with-vendor=‘Oracle America, Inc.’
  [1:5.0.6.2-15]
• Resolves: rhbz#1545034 - CVE-2018-1055 CVE-2018-6871
  [1:5.0.6.2-14]
• Resolves: rhbz#1454693 segv on interrupting tiled rendering
  [1:5.0.6.2-13]
• Related: rhbz#1444437 remove timer if document closed before it fires
  [1:5.0.6.2-12]
• Resolves: rhbz#1454598 crash on selecting bullet from toolbar
  [1:5.0.6.2-11]
• Related: rhbz#1444437 restart second instance cleanly
  [1:5.0.6.2-10]
• Resolves: rhbz#1444437 segv in gnome-documents integration
  [1:5.0.6.2-9]
• Resolves: rhbz#1445635 CVE-2017-7870 Heap-buffer-overflow in
  tools::Polygon::Insert
  [1:5.0.6.2-8]
• Resolves: rhbz#1437537 fix csv a11y
  [1:5.0.6.2-7]
• Resolves: rhbz#1431539 gnome-documents needs libreofficekit
• Resolves: rhbz#1435535 CVE-2017-3157 Arbitrary file disclosure in
  Calc and Writer
  [1:5.0.6.2-6]
• Resolves: rhbz#1401082 gnome hangs opening certain docx
• Resolves: rhbz#1421726 drop use of CAIRO_OPERATOR_DIFFERENCE