oraswdb_install erroneously complains about swap memory would be too low

[ThiloSolbrig]

In roles/oraswdb_install/tasks/19.3.0.0.yml asserting swap memory erroneously fails, though 16GB swap are configured. For any reason, on systems with 16GB swap, effective amount of swap is 16383M instead of 16384M.

# lvdisplay /dev/vg_sys/swap 
  --- Logical volume ---
  LV Path                /dev/vg_sys/swap
  LV Name                swap
  VG Name                vg_sys
  LV UUID                bSDIpB-v8Lv-eJvS-UcrM-X6sM-MxuM-a7FWyc
  LV Write Access        read/write
  LV Creation host, time localhost.localdomain, 2025-10-17 11:32:30 +0200
  LV Status              available
  # open                 1
  LV Size                16.00 GiB <---
  Current LE             4096
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           252:1

# free -m
               total        used        free      shared  buff/cache   available
Mem:           15666       14261        2009         124        2212        1405
Swap:          16383 <---   1797       14586

Although swap would be reflected correctly, the assert would fail too because it expects more than 16 GB swap (>16384, not >=16384).
To make this a bit more customizable, I introduced a variable orahost_min_swap_mb to replace the hard coded limit; and changed the comparison from > to >=