[#420] Fixed incorrect parsing of `indices` option when the alias contains `routing` values
[#420] Fixed incorrect parsing of `indices` option when the alias contains `routing` values

If a routing value is set, Elasticsearch returns a key called "index_routing",
which can overwrite the "indices" or "index" value if it comes later in the hash iteration,
since that key also matches the regex "/index|indices/".

Closes #420

iamrahulroy/retire,alphagov/tire,tklee/tire_shiphawk,ChapterMedia/tire,HenleyChiu/tire,dbose/retire,1776/tire,brijeshgpt7/retire,zaharpecherin/retire,elbuo8/retire,rubydubee/retire,Telmate/tire,mavenlink/retire,fabn/retire,karmi/retire,doximity/tire