SimpleScheduler: pause doesn't work

[RustamSultansoy]

Describe the bug
When you try to inject SimpleScheduler and then call SimpleScheduler::pause nothing happens.

Expected behavior
Scheduled jobs should be paused

Actual behavior
Nothing happens

To Reproduce
Add some method annotated by @scheduled
Then try to pause scheduler using SimpleScheduler::pause method.

looks like bug is here.

[ghost]

/cc @mkouba

[mkouba]

Uf, that's a stupid bug :-(. @RustamSultansoy Would you care to send a PR? The fix is very straightforward. A test could be a little bit more challenging ;-)

[RustamSultansoy]

@mkouba yeap, will send a pull request from my personal account later