Bugfix: Correct schema for install configuration.

Problem/Motivation

The module currently has a defined configuration schema for "monit_drupal_connector.monitconfig.yml" that doesn't actually appear to be used in the project..

No schema is defined for the actual configuration file that gets exported when the module is installed, which is "monit_drupal_connector.adminsettings.yml".

Steps to reproduce

• Install and enable the module.
• Navigate to /admin/config/system/monit_drupal_connector_config and configure an access token value.
• Export configuration
• All configuration values are exported to monit_drupal_connector.adminconfig.yml. Nothing is exported to monit_drupal_connector.monitconfig.yml.

Proposed resolution

Correct the install schema to set one for monit_drupal_connector.adminconfig.yml, and remove the unused schema for config file monit_drupal_connector.monitconfig.yml.