This is a combination of 2 commits.

i18n-perf: cache map of breakiterators, tdf#108703

See source code comment.

Reviewed-on: https://gerrit.libreoffice.org/42866Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

(cherry picked from commit 0f6b9eca)

 Conflicts:
	i18npool/inc/breakiterator_unicode.hxx
	i18npool/source/breakiterator/breakiterator_unicode.cxx

Backported.

Throw exception also in case an unexpected rBreakType was passed

(cherry picked from commit f6990d3f)

331e12ab5115401b9fa87e1f0f2be51f33ccbc75

Change-Id: I75015f3492a24f5f69a163dca165dcf57d6f0e28
Reviewed-on: https://gerrit.libreoffice.org/42906Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Khaled Hosny <khaledhosny@eglug.org>