test-path: increase timeout

The tests fail in Fedora's koji with a timeout. Let's just bump
the timeout:
--- stderr ---
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-exists.service: Failed to create cgroup /system.slice/kojid.service/path-exists.service: Permission denied
path-exists.service: Succeeded.
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-exists.service: Failed to create cgroup /system.slice/kojid.service/path-exists.service: Permission denied
path-exists.service: Succeeded.
path-exists.path: Succeeded.
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-existsglob.service: Failed to create cgroup /system.slice/kojid.service/path-existsglob.service: Permission denied
path-existsglob.service: Succeeded.
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-existsglob.service: Failed to create cgroup /system.slice/kojid.service/path-existsglob.service: Permission denied
path-existsglob.service: Succeeded.
path-existsglob.path: Succeeded.
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-changed.service: Failed to create cgroup /system.slice/kojid.service/path-changed.service: Permission denied
path-changed.service: Succeeded.
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-changed.service: Failed to create cgroup /system.slice/kojid.service/path-changed.service: Permission denied
path-changed.service: Succeeded.
path-changed.path: Succeeded.
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-modified.service: Failed to create cgroup /system.slice/kojid.service/path-modified.service: Permission denied
path-modified.service: Succeeded.
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-modified.service: Failed to create cgroup /system.slice/kojid.service/path-modified.service: Permission denied
path-modified.service: Succeeded.
path-modified.path: Succeeded.
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-mycustomunit.service: Failed to create cgroup /system.slice/kojid.service/path-mycustomunit.service: Permission denied
path-mycustomunit.service: Succeeded.
path-unit.path: Succeeded.
Failed to connect to system bus: No such file or directory
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-directorynotempty.service: Failed to create cgroup /system.slice/kojid.service/path-directorynotempty.service: Permission denied
path-directorynotempty.service: Succeeded.
-.slice: Failed to enable/disable controllers on cgroup /system.slice/kojid.service, ignoring: Permission denied
path-directorynotempty.service: Failed to create cgroup /system.slice/kojid.service/path-directorynotempty.service: Permission denied
path-directorynotempty.service: Failed to attach to cgroup /system.slice/kojid.service/path-directorynotempty.service: No such file or directory
path-directorynotempty.service: Failed at step CGROUP spawning /bin/true: No such file or directory
path-directorynotempty.service: Main process exited, code=exited, status=219/CGROUP
path-directorynotempty.service: Failed with result 'exit-code'.
Test timeout when testing path-directorynotempty.path