Fixed: always inject the plugins' service providers, even when an HTT…

Quote from i-MSCP Github (1.5.3)

Code

1. Fixed: always inject the plugins' service providers, even when an HTTP request does not target a plugin, because sometime, a plugin will listen to events only, such as the demo plugin.
2. CS fixes, typo

Source: https://github.com/i-MSCP/imsc…bcd424c2e6a79c15bd405bac5