[Satellite6] foreman-maintain doesn't quit the actual run when q is pressed

Issue

• Unable to upgrade from Red Hat Satellite 6.3 to 6.4

Running Checks before upgrading to Satellite 6.4
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Check for verifying syntax for ISP DHCP configurations:               [SKIPPED]
DHCP feature is not enabled
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Check whether all services are running:                               [OK]
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Check whether all services are running using hammer ping:             [OK]
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Check for paused tasks:                                               [OK]
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Check to validate candlepin database:                                 [OK]
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Check if EPEL repository enabled on system: 
/ Checking for presence of EPEL repository                            [OK]      
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Check for running tasks:                                              [OK]
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Check for old tasks in paused/stopped state:                          [FAIL]
Found 11 paused or stopped task(s) older than 30 days
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Continue with step [Delete old tasks]?, [y(yes), n(no), q(quit)] q                   -----> q is pressed 
Check for pending tasks which are safe to delete:                     [OK]      
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Check for tasks in planning state:                                    [OK]
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Check for recommended disk speed of pulp, mongodb, pgsql dir.: 
\ Finished                                                                      

Disk speed : 21 MB/sec                                                [FAIL]
Slow disk detected /var/lib/pulp mounted on /dev/mapper/myvg-rootvol.
             Actual disk speed: 21 MB/sec
             Expected disk speed: 60 MB/sec.
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Check whether reports have correct associations:                      [OK]
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Verify puppet and provide upgrade guide for it: 
/ current puppet version:                                             [OK]      
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Validate availability of repositories: 
/ Validating availability of repositories for 6.4                     [OK]      
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Scenario [Checks before upgrading to Satellite 6.4] failed.

The following steps ended up in failing state:

  [check-old-foreman-tasks]
  [disk-performance]