See gh-20108

Closes gh-20012

* pr/20109:
  Polish "Create HazelCastClient if necessary"
  Create HazelCastClient if necessary

Closes gh-20109

See gh-20109

This commit makes sure to create a HazelcastClient if an instance name
is provided in configuration and if no such client already exists. This
harmonizes the behaviour with of the server counter-part.

See gh-20109

See gh-20107

See gh-20105

See gh-20104

See gh-19588

Closes gh-20100

Closes gh-20099

Closes gh-20096

Closes gh-20095

Closes gh-20094

Closes gh-20093

Closes gh-20091

Closes gh-20090

Closes gh-20089

Closes gh-20088

Closes gh-20087

Closes gh-20086

Closes gh-20085

Closes gh-20084

Closes gh-20083

Closes gh-20082

Closes gh-20081

Closes gh-20080

Closes gh-20079

Closes gh-20078

Closes gh-20077

Closes gh-20076

Closes gh-20075

Closes gh-20074

Closes gh-20073

Closes gh-20072

Closes gh-20071

Closes gh-20070

Closes gh-20069

Closes gh-20068

Closes gh-20067