Bump minimum upgradable version to 4.4.7

[colemanw]

Overview

CiviCRM v4.4. was released back in 2013. How time flies! This PR bumps the minimum upgradable version from 4.2.9 to 4.4.7.

Before

Technically possible to upgrade from 4.2 (although probably not a good idea).

After

Now you must be on at least 4.4.7 to upgrade (which is not quite as ancient).

Technical Details

Although there were other releases in the 4.4 LTS series, none of them contained any schema changes or upgrade steps; 4.4.7 is the last release to modify the schema in that series, which is why I picked that version as the minimum.

Comment

I've also added an update to the documentation: civicrm/civicrm-sysadmin-guide#253

[civibot]

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[colemanw]

@totten would you be able to do a little maintenance on the upgrade tests so this can pass jenkins? It's time to cull old test DBs < 4.4.7 and probably generate a new multilingual DB to replace the one from 4.2.

[eileenmcnaughton]

I think it's time.... @MikeyMJCO asked the right questions on the docs PR

[seamuslee001]

Jenkins re test this please

[seamuslee001]

Jenkins re test this please

[seamuslee001]

@colemanw error now is

Smarty error: unable to read resource:                                 [warning]
"/home/jenkins/bknix-dfl/build/core-17750-4l4r8/web/sites/all/modules/civicrm/CRM/Upgrade/Incremental/sql/4.4.7.mysql.tpl&quot

[colemanw]

That's strange. Why would a 4.5 upgrade be trying to access a 4.4 upgrade file?
Looks like there's more info at /home/jenkins/bknix-dfl/build/core-17750-4l4r8/.civibuild/debug/4.5.0-setupsh.sql.bz2.log on the server. I'm having trouble logging into the jenkins box - are you able to open that file?

[seamuslee001]

@colemanw the reason is because of https://github.com/civicrm/civicrm-core/blob/master/CRM/Upgrade/Incremental/php/FourSix.php#L130

[colemanw]

Thanks @seamuslee001, good detective work. I've added that sql file back in.

[seamuslee001]

Merging now that tests have passed

[colemanw]

Thanks @seamuslee001 for seeing it through!