PDF: Fix yamllint warnings & fold reusable code

PDF: Fix yamllint warnings & fold reusable code

- ericsson-pod{1,2}: Fold node, disk params;
- lf-pod4: Jump server uses same disk params;
- zte-pod{2,3}: only minor formatting;

Change-Id: Ib280aca93f9d6ab1768afa369b922c71485cf79c
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
(cherry picked from commit a9aeec02c2c649b01ef9aad20c0c89f723a1f356)