set compression to SNAPPY for CI runs (#578)

This is necessary for parseablehq/quest#47 to
work. When default compression algorithm was used, parquet files had
unknown compression and couldn't be loaded during integrity testing
using https://github.com/xitongsys/parquet-go.

Author: theteachr

docker-compose-test.yaml

@@ -43,6 +43,7 @@ services:
       - P_USERNAME=parseableadmin
       - P_PASSWORD=parseableadmin
       - P_CHECK_UPDATE=false
+      - P_PARQUET_COMPRESSION_ALGO=snappy
     networks:
       - parseable-internal
     healthcheck: