provision/docker/nodecontainer: fix bug on update specific pool env.
provision/docker/nodecontainer: fix bug on update specific pool env.

ArxdSilva/tsuru,cezarsa/tsuru,gwmoura/tsuru,ggarnier/tsuru,tsuru/tsuru,tsuru/tsuru,gwmoura/tsuru,ggarnier/tsuru,cezarsa/tsuru,guilhermebr/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,gwmoura/tsuru,guilhermebr/tsuru,tsuru/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,tsuru/tsuru,guilhermebr/tsuru,ggarnier/tsuru,guilhermebr/tsuru,ArxdSilva/tsuru,ggarnier/tsuru