Electricitymap-contrib: New exchanges for US are still not appearing in the country panels

[robertahunt]

despite the fact that kibana seems to have no trouble grabbing the exchanges now:
https://kibana.electricitymap.org/app/kibana#/discover?_g=()&_a=(columns:!(_source),filters:!(('$state':(store:appState),meta:(alias:!n,disabled:!f,index:'96f67170-0c49-11e9-85c1-1d63df8c862c',key:extra.key,negate:!f,params:(query:US-MIDA-PJM-%3EUS-MIDW-MISO,type:phrase),type:phrase,value:US-MIDA-PJM-%3EUS-MIDW-MISO),query:(match:(extra.key:(query:US-MIDA-PJM-%3EUS-MIDW-MISO,type:phrase))))),index:'96f67170-0c49-11e9-85c1-1d63df8c862c',interval:auto,query:(language:lucene,query:''),sort:!('@timestamp',desc))

[fbarl]

Related to #2319.

[robertahunt]

Looks like it fixed itself... maybe I just hadn't waited long enough for the map to update. I love bugs that fix themselves <3