Don't try to load metrics definition file with an empty filename.

FAQ: unable to convert current value to float.

Refactor on connection management.

Fix for UNLIMITED on resources query and Go v1.14.

Fix lib issue in docker.

Fix Alpine docker image size.

Use a wildcard on file to upload.

Merge pull request iamseth#69 from vvelikodny/patch-1

fix func doc mistake

Fix for Alpine image.

If unable to ping Oracle, try to reconnect before giving up.