Avoid passphrase during gpg key generation

src/freedombone-adduser

 echo "Name-Real:  $ADD_USERNAME" >> /home/$ADD_USERNAME/gpg-genkey.conf
 echo "Name-Email: $ADD_USERNAME@$HOSTNAME" >> /home/$ADD_USERNAME/gpg-genkey.conf
 echo 'Expire-Date: 0' >> /home/$ADD_USERNAME/gpg-genkey.conf
+echo "Passphrase: ''" >> /home/$ADD_USERNAME/gpg-genkey.conf
 chown $ADD_USERNAME:$ADD_USERNAME /home/$ADD_USERNAME/gpg-genkey.conf
-su -m root -c "gpg --homedir /home/$ADD_USERNAME/.gnupg --batch --passphrase '' --full-gen-key /home/$ADD_USERNAME/gpg-genkey.conf" - $ADD_USERNAME
+su -m root -c "gpg --homedir /home/$ADD_USERNAME/.gnupg --batch --full-gen-key /home/$ADD_USERNAME/gpg-genkey.conf" - $ADD_USERNAME
 chown -R $ADD_USERNAME:$ADD_USERNAME /home/$ADD_USERNAME/.gnupg
 shred -zu /home/$ADD_USERNAME/gpg-genkey.conf
 MY_GPG_PUBLIC_KEY_ID=$(gpg_pubkey_from_email "$ADD_USERNAME" "$ADD_USERNAME@$HOSTNAME")

src/freedombone-base-email

     echo "Name-Email: $MY_EMAIL_ADDRESS" >> /home/$MY_USERNAME/gpg-genkey.conf
     echo "Name-Comment: $GPG_KEY_USAGE" >> /home/$MY_USERNAME/gpg-genkey.conf
     echo 'Expire-Date: 0' >> /home/$MY_USERNAME/gpg-genkey.conf
+    echo "Passphrase: ''" >> /home/$MY_USERNAME/gpg-genkey.conf
     chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/gpg-genkey.conf
-    su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --passphrase '' --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
+    su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
     chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
 
     shred -zu /home/$MY_USERNAME/gpg-genkey.conf
         echo "Name-Real:  $MY_NAME" >> /home/$MY_USERNAME/gpg-genkey.conf
         echo "Name-Email: $MY_EMAIL_ADDRESS" >> /home/$MY_USERNAME/gpg-genkey.conf
         echo 'Expire-Date: 0' >> /home/$MY_USERNAME/gpg-genkey.conf
+        echo "Passphrase: ''" >> /home/$MY_USERNAME/gpg-genkey.conf
         chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/gpg-genkey.conf
         echo $'Generating a new GPG key'
-        su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --passphrase '' --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
+        su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
         chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
         KEY_EXISTS=$(gpg_key_exists "$MY_USERNAME" "$MY_EMAIL_ADDRESS")
         if [[ $KEY_EXISTS == "no" ]]; then

src/freedombone-utils-backup

         echo "Name-Email: $MY_EMAIL_ADDRESS" >> /home/$MY_USERNAME/gpg-genkey.conf
         echo "Name-Comment: backup key" >> /home/$MY_USERNAME/gpg-genkey.conf
         echo 'Expire-Date: 0' >> /home/$MY_USERNAME/gpg-genkey.conf
+        echo "Passphrase: ''" >> /home/$MY_USERNAME/gpg-genkey.conf
         chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/gpg-genkey.conf
         echo $'Backup key does not exist. Creating it.'
-        su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --passphrase '' --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
+        su -m root -c "gpg --homedir /home/$MY_USERNAME/.gnupg --batch --full-gen-key /home/$MY_USERNAME/gpg-genkey.conf" - $MY_USERNAME
         chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.gnupg
 
         shred -zu /home/$MY_USERNAME/gpg-genkey.conf