Update ecs.py
Update ecs.py

fix doc
ZuluPro/libcloud,apache/libcloud,StackPointCloud/libcloud,andrewsomething/libcloud,andrewsomething/libcloud,ByteInternet/libcloud,pquentin/libcloud,Scalr/libcloud,Kami/libcloud,illfelder/libcloud,ByteInternet/libcloud,erjohnso/libcloud,mistio/libcloud,t-tran/libcloud,t-tran/libcloud,StackPointCloud/libcloud,pquentin/libcloud,apache/libcloud,t-tran/libcloud,erjohnso/libcloud,pquentin/libcloud,mistio/libcloud,andrewsomething/libcloud,illfelder/libcloud,illfelder/libcloud,ZuluPro/libcloud,vongazman/libcloud,vongazman/libcloud,apache/libcloud,ZuluPro/libcloud,erjohnso/libcloud,Kami/libcloud,Scalr/libcloud,mistio/libcloud,ByteInternet/libcloud,Kami/libcloud,Scalr/libcloud,vongazman/libcloud,StackPointCloud/libcloud