Run tests with C locales.

This fixes tests failing on translated messages.
groups: searches also within localized names (RhBug:1150474)
base: package_upgrade does not reinstall or downgrade (RhBug:1149972)
base: package_downgrade prints message on failure
base: package_install allows install different arch of installed package
base: package_reinstall works only with the same package versions
doc: swap command alternative mentioned (RhBug:1110780)
fixed error summary traceback (RhBug:1151740)
tests: removed mock patch for _, P_
install: allow installation of provides with glob (Related:RhBug:1148353)
new authors added
cli: _process_demands() does not respect --caheonly (RhBug:1151854)
base: output a whole list of installed packages with glob pattern (RhBug:1163063)
depsolving errors are separated by new line (Rhbug:1170232)
transifex update
bash-completion: use sqlite cache from dnf-plugins-core

Reference: https://github.com/rpm-software-management/dnf-plugins-core/pull/45
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
bash-completion: fix local completion (RhBug:1151231)

we will use dnf python api

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1151231
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
bash-completion: don't query if we trying to use local file (RhBug:1153543)

Reported-by: Jan Synacek <jsynacek@redhat.com>
Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1153543
Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
New version: 0.6.3
build 0.6.3-1