Split demo_data.sql into "minimum necessary data" and "actual demo data"

[bcipriano]

Describe the enhancement demo_data.sql is misleadingly named, as it actually contains some data which is needed for OpenCue to function at all. Our docs mention populating the database with this data, but it's unclear that it's actually needed.

Some of the data contained in that file is actually demo data, like example shows, facilities, and so on.

We should split this file, so that we have both a) a "minimum needed data" for starting a fresh production deployment (initial_data.sql maybe?), and b) an actual "demo data" for experimenting with a new deployment.

Screenshots N/A

Version Number 8d874a392bb420ee26a70dc240b42a65366fea3d

Additional context Add any other context here.

[larsbijl]

We should remove the values that are being set in the CONFIG table but are no longer used.

• MAX_PING_TIME
• MIN_CORES_REQUIRED
• MIN_MEM_REQUIRED
• MAX_PPS
• MAX_LAYER_COUNT_PER_JOB
• MAX_FRAME_COUNT_PER_JOB
• DEFAULT_FRAME_RETRIES
• LOCK_SHOW_ALERTS

These are not referenced anywhere and are likely to confuse new Ops.