Upgrade fails if location hours tables already exist

[bwsmmiller]

Describe the bug
If the location hours tables already exist, upgrading fails as the scripts always attempt to create the new tables.

To Reproduce
Steps to reproduce the behavior:

1. Start with a server 5.3.1+
2. Revert to a previous server version.
3. Upgrade back to 5.3.1+
4. Upgrade will fail attempting to create tables that already exist.

Expected behavior
The script should return an error indicating that the tables already exist, but allow the upgrade to complete.

[bwsmmiller]

Two possible ways to resolve this in the script.

1. We could check for existing values, delete any that already exist, then populate with newly generated. Script could execute without error, but would take more fine tuning of the update script.
2. More blunt approach: if the tables already exist at all, we don't check for values of those tables, just error out and let upgrades finish. Easier to implement but introduces possibilities for bugs.