Simplify install/upgrade commands and db flags

[manics]

Follow on from ome/ansible-role-omero-server#12 (comment)

• replaces omego upgrade with omego install --upgrade
• replaces --initdb --upgradedb with a single --managedb
• adds tests for omero db upgrade -n exit codes

This should be backwards compatible

[joshmoore]

A bit of feedback:

• I think the general deprecation strategy and the fewer options all make sense at the 0.6.x level
• but I'm worried that the actions are becoming less clear (ignoring the deprecated bits).
• I wonder if a different name ("server"? "deploy"?) would help clarify,
• or even if the goal shouldn't be usage as ansible module (omego_install, etc)

Obviously those are pretty big changes. If we need this as 0.6.2 in order to move forward, then no immediate objections from me, but I think we will have to revisit this.

cc: @sbesson

[manics]

We could simplify things by getting rid of the managedb flag, so its omego install or omego install --upgrade and any db stuff just happens.

[manics]

PRs dependent on this PR:

• Add flag to disable database init/upgrades (IDR-0.4.0) ansible-role-omero-server#12
  • Refactor startup scripts, envvars for all omero parameter omero-server-docker#1
  • IDR 0.4.0 IDR/deployment#31

[joshmoore]

👍 for the test. It certainly looks to cover the new setup well. Merging and releasing as 0.6.2, and we'll decide on the breaking changes for 0.7 or 1.0.

[joshmoore]

https://pypi.python.org/pypi/omego/0.6.2