Here's another online reference to the Counjaille:

"Counjaille.
One of the popular tunes in Guadeloupe «Counjaille O Counjaille etc...) and is proof of a Congolese presence in the country. This term describes a dance from the Congolese ritual, traces of which can be found in Guadeloupe and Santo Domingo in 1807/1809 at a time when ethnic groups were travelling from these countries to New Orleans to escape from the Napoleonic wars.

In the same way as the bamboula, Calinda, Chacha etc., these dances were performed from French Guiana to New Orleans as well as Santo Domingo and all of the French West Indies. …

It is important to specify that in the Creole language, this word can mean several different things. The same word describes the music, dance, group gathering, etc"

http://svr1.cg971.fr/lameca/dossiers/gwoka/references/glossaire/glossaire_eng.html

Given the antiquity of the Counjaille dance, it appears that the roustabouts may have adapted those dance steps to fit their needs rather than independently created the Coonjine dance.

Also, similar to the glossary, in the United States, the word Coonjine apparently came to be used as a referent for the roustabouts' particular movements, and the dance that Black children and others imitated from those movements, the songs which accompanied that dance, and the dock workers themselves.