Support setting of X-AIFI-LocationId and X-AIFI-Store in headers

[tayzlor]

Example request below

TOKEN=token
BODY=`cat <<EOM
{
    "customer": {
        "sessionId": "$SESSION_ID",
        "trackId": "12345",
        "transactionId": 1,
        "role": "customer"
    }
}
EOM
`
curl \
    -X POST \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $TOKEN" \
    -H 'X-AIFI-LocationId: 1' \
    -H 'X-AIFI-Store: public-sandbox' \
    -d "$BODY" \
    https://oasis-api.public-sandbox.client.aifi.io/api/aifi/customers/entered