H2O: joinOthers() - method to detect and join existing cloud
H2O: joinOthers() - method to detect and join existing cloud

This is a helper function in leiu of a real client mode. The idea
is that a server cloud (H2O nodes) is already up and formed, and a
client (e.g Mahout) joins this cloud. The client does not know (and
should not care) how many nodes are in the cloud.

This function is a replacement for a real "connect to cloud" API.

Signed-off-by: Anand Avati <6a1810c170bd423868ce2e225ecea39d80cade0f@redhat.com>

brightchen/h2o-3,pchmieli/h2o-3,ChristosChristofidis/h2o-3,h2oai/h2o-flow,jangorecki/h2o-3,kyoren/https-github.com-h2oai-h2o-3,jangorecki/h2o-3,weaver-viii/h2o-3,printedheart/h2o-3,printedheart/h2o-3,kyoren/https-github.com-h2oai-h2o-3,weaver-viii/h2o-3,ChristosChristofidis/h2o-3,jangorecki/h2o-3,h2oai/h2o-dev,spennihana/h2o-3,mathemage/h2o-3,weaver-viii/h2o-3,bospetersen/h2o-3,spennihana/h2o-3,ChristosChristofidis/h2o-3,mrgloom/h2o-3,PawarPawan/h2o-v3,mathemage/h2o-3,tarasane/h2o-3,jangorecki/h2o-3,kyoren/https-github.com-h2oai-h2o-3,nilbody/h2o-3,printedheart/h2o-3,bikash/h2o-dev,printedheart/h2o-3,brightchen/h2o-3,nilbody/h2o-3,mrgloom/h2o-3,h2oai/h2o-dev,h2oai/h2o-3,michalkurka/h2o-3,bospetersen/h2o-3,weaver-viii/h2o-3,YzPaul3/h2o-3,datachand/h2o-3,junwucs/h2o-3,kyoren/https-github.com-h2oai-h2o-3,spennihana/h2o-3,madmax983/h2o-3,brightchen/h2o-3,michalkurka/h2o-3,nilbody/h2o-3,junwucs/h2o-flow,mrgloom/h2o-3,mrgloom/h2o-3,PawarPawan/h2o-v3,kyoren/https-github.com-h2oai-h2o-3,YzPaul3/h2o-3,bospetersen/h2o-3,bikash/h2o-dev,h2oai/h2o-dev,ChristosChristofidis/h2o-3,nilbody/h2o-3,tarasane/h2o-3,brightchen/h2o-3,mathemage/h2o-3,YzPaul3/h2o-3,kyoren/https-github.com-h2oai-h2o-3,h2oai/h2o-3,YzPaul3/h2o-3,pchmieli/h2o-3,h2oai/h2o-dev,printedheart/h2o-3,junwucs/h2o-3,jangorecki/h2o-3,madmax983/h2o-3,spennihana/h2o-3,h2oai/h2o-dev,madmax983/h2o-3,madmax983/h2o-3,michalkurka/h2o-3,datachand/h2o-3,madmax983/h2o-3,bospetersen/h2o-3,PawarPawan/h2o-v3,tarasane/h2o-3,tarasane/h2o-3,kyoren/https-github.com-h2oai-h2o-3,brightchen/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,datachand/h2o-3,datachand/h2o-3,michalkurka/h2o-3,mathemage/h2o-3,nilbody/h2o-flow,brightchen/h2o-3,datachand/h2o-3,printedheart/h2o-flow,PawarPawan/h2o-v3,junwucs/h2o-3,YzPaul3/h2o-3,junwucs/h2o-3,junwucs/h2o-flow,h2oai/h2o-3,bospetersen/h2o-3,tarasane/h2o-3,h2oai/h2o-3,PawarPawan/h2o-v3,junwucs/h2o-3,spennihana/h2o-3,pchmieli/h2o-3,bikash/h2o-dev,junwucs/h2o-3,pchmieli/h2o-3,nilbody/h2o-flow,junwucs/h2o-3,pchmieli/h2o-3,h2oai/h2o-3,tarasane/h2o-3,mathemage/h2o-3,pchmieli/h2o-3,datachand/h2o-3,madmax983/h2o-3,h2oai/h2o-dev,YzPaul3/h2o-3,brightchen/h2o-3,h2oai/h2o-flow,bospetersen/h2o-3,ChristosChristofidis/h2o-3,jangorecki/h2o-3,mathemage/h2o-3,ChristosChristofidis/h2o-3,mrgloom/h2o-3,bospetersen/h2o-3,printedheart/h2o-3,datachand/h2o-3,weaver-viii/h2o-3,spennihana/h2o-3,h2oai/h2o-3,weaver-viii/h2o-3,mrgloom/h2o-3,ChristosChristofidis/h2o-3,printedheart/h2o-flow,bikash/h2o-dev,pchmieli/h2o-3,h2oai/h2o-3,tarasane/h2o-3,nilbody/h2o-3,jangorecki/h2o-3,PawarPawan/h2o-v3,nilbody/h2o-3,michalkurka/h2o-3,YzPaul3/h2o-3,bikash/h2o-dev,madmax983/h2o-3,junwucs/h2o-flow,mathemage/h2o-3,h2oai/h2o-3,nilbody/h2o-flow,weaver-viii/h2o-3,PawarPawan/h2o-v3,printedheart/h2o-3,bikash/h2o-dev,michalkurka/h2o-3,mrgloom/h2o-3,printedheart/h2o-flow,h2oai/h2o-dev,nilbody/h2o-3