Support restart

[zhenik]

Feature description

terraform-nomad-hive on startup phase, schemaTool binary runs, which attempts to create/upgrade tables in postgres DB.

https://github.com/Skatteetaten/terraform-nomad-hive/blob/master/docker/bin/hivemetastore#L4-L5

When nomad restart, hive restart also. terraform-nomad-hive accidentally fail on startup phase when restarts.

Why is it needed?

We need support redeploys, restart.

Suggestion(s)/solution(s) [Optional]

I see there is attempt to support restart(s) with || true at the end of cmd. But it is not seem enough to handle restarts.

hive --service schemaTool -initSchema -dbType postgres --verbose || true 
hive --service schemaTool -upgradeSchema -dbType postgres --verbose || true

Definition of done

terraform-nomad-hive restarts correctly

Checklist (after created issue)

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