Moderate: libreoffice security update (Oracle Linux 7)

[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