fix trailing space for power state for bug #14738

Test effectué sur luxembourg :

• correction des espaces
• execution ci
• récupération du deb généré par la CI
• upload du deb sur kadeploy.luxembourg

Test avant :

lpouilloux@fluxembourg:~$ kapower3 status petitprince-9 
Power operation #P-7235b800-97e5-40df-a678-97f7167955e7 started
Launching a power operation on petitprince-9.luxembourg.grid5000.fr
Performing a Power[Status] step
  power
   * A power status will be performed
---
Power operation did not start at the moment
---
!!! The nodes petitprince-9.luxembourg.grid5000.fr failed on step power
Step Power[Status] failed for petitprince-9.luxembourg.grid5000.fr after 5s
End of power operation on cluster petitprince after 6s
---
---
Power operation #P-7235b800-97e5-40df-a678-97f7167955e7 done

The power operation failed on nodes
petitprince-9.luxembourg.grid5000.fr (Status-power: petitprince-9-bmc: on)

• installation du deb à la main

Test après :

petitprince-9.luxembourg.grid5000.fr (Status-power: petitprince-9-bmc: on)
lpouilloux@fluxembourg:~$ kapower3 status petitprince-9 
Power operation #P-9a9ed8f9-dbf3-4f46-9b0b-70319662e08e started
Launching a power operation on petitprince-9.luxembourg.grid5000.fr
Performing a Power[Status] step
  power
   * A power status will be performed
End of step Power[Status] after 1s
End of power operation for petitprince-9.luxembourg.grid5000.fr after 1s
End of power operation on cluster petitprince after 2s
---
petitprince-9.luxembourg.grid5000.fr: petitprince-9-bmc: on
---
Power operation #P-9a9ed8f9-dbf3-4f46-9b0b-70319662e08e done

The power operation is successful on nodes
petitprince-9.luxembourg.grid5000.fr

• désinstallation du paquet et réinstallation du paquet depuis le dépôt.