Fix junos_commit check arg (#266)
Fix junos_commit check arg (#266)

Fix a regression caused by #109. The new check argument added to junos_commit by #109 was not correctly specified. Therefore, the following error was produced when the
task ommitted the check argument (default behavior).
```
fatal: [r0]: FAILED! => {"changed": false, "failed": true, "msg": "value of check must be one of: yes,on,1,true,1,True,no,off,0,false,0,False, got: False"}
```
This change correctly specifies the argument's type as bool.

Juniper/ansible-junos-stdlib,Juniper/ansible-junos-stdlib