Removing ExternalModules static calls

[jrpence]

Changing from ExternalModules call to get project settings from the framework call

[ChemiKyle]

Referencing the ExternalModules class directly is actually the faux pas, not simply the static call. At a glance, this one seems like an easy correction though.

Since this module doesn't specify a framework_version in the config.json, it may be unwise to reference framework, as that borrows from whatever framework version ships with the version of REDCap this module is used on.

[ChemiKyle]

Suggested change

	$projSettings = $externalModule->framework->getProjectSettings($project_id);
	$projSettings = $externalModule->getProjectSettings($project_id);

Enabling the module fails if using ->framework:

REDCap crashed due to an unexpected PHP fatal error!
Error message: Uncaught Error: Call to a member function getProjectSettings() on null in /var/www/html/modules/send_rx_v0.0.0/includes/send_rx_functions.php:40

Removing ->framework makes it function properly. Likely that we don't have access to framework because the module does not specify a framework_version.