chore(release):rebase dev-21.10.x on 21.10.x (#388)

* chore(release): merge release 21.10.next into 21.10.x (#386)

* enh(broker): cbd with multiargs and robot tests (#306)

-enh(broker): cbd with multiargs and robot tests
-Validate with tests/broker/command-line.robot
-Update README.md
-Common.py : fix find in log with timeout

REFS: MON-13901

* fix(broker/bam): downtimes on kpi can be more than one

* enh(tests/bam): new tests to reproduce a bug
* chore(doc): CHANGELOG updated and version set to 21.10.3
* chore(tests): README updated

REFS: MON-14091

* fix(broker/engine): grpc api can be changed through configuration. Otherwise it is fixed to localhost (#320)

REFS: MON-13904

* fix(broker/rrd): rebuild fixed in 21.10 (#340)

* Also an issue due to conan fixed, python 3.8 is needed.

REFS: MON-14092

* fix(ci): issues with conan fixed

* fix(ci/scripts): conan bad path

* fix(broker/bam): overlapping downtimes on kpi service are well handled now. (#341)

REFS: MON-14091

* fix(ci/tests): missing dependencies for python38

* fix(broker/lua): lua stream connector accepts empty parameters(21.10) (#359)

REFS: MON-13875

* fix(broker/muxer): poller waits at most 5s to send goodbye to broker before shutdown (#360)

REFS: MON-14511

Co-authored-by: denliA <91119589+denliA@users.noreply.github.com>
Co-authored-by: David Boucher <dboucher@centreon.com>
Co-authored-by: jean-christophe81 <98889244+jean-christophe81@users.noreply.github.com>

* fix(broker/config): if failovers are badly defined, error logs are raised but this does not stop broker (#365)

REFS: MON-6986

Co-authored-by: denliA <91119589+denliA@users.noreply.github.com>
Co-authored-by: David Boucher <dboucher@centreon.com>
Co-authored-by: jean-christophe81 <98889244+jean-christophe81@users.noreply.github.com>