Missing H2 nodes in Africa case

[davide-f]

Describe the feature you'd like to see

H2 nodes are missing in the africa case as the GADM clustering drops shapes.

The local test I did leads to the following list of missing nodes:

   ```

'H2 pipeline DZ.1_1_AC -> DZ.20_1_AC',
'H2 pipeline DZ.41_1_AC -> NE.1_1_AC',
'H2 pipeline GH.15_2_AC -> NG.25_1_AC',
'H2 pipeline GH.7_2_AC -> TG.3_1_AC',
'H2 pipeline GM.6_1_AC -> GW.2_1_AC',
'H2 pipeline GM.6_1_AC -> SN.13_1_AC',
'H2 pipeline KE.19_1_AC -> KE.28_1_AC',
'H2 pipeline KE.19_1_AC -> TZ.27_1_AC',
'H2 pipeline MZ.11_1_AC -> MZ.7_1_AC',
'H2 pipeline MZ.11_1_AC -> MZ.9_1_AC',
'H2 pipeline MZ.1_1_AC -> MZ.7_1_AC',
'H2 pipeline MZ.3_1_AC -> MZ.4_1_AC',
'H2 pipeline MZ.3_1_AC -> MZ.9_1_AC',
'H2 pipeline NE.1_1_AC -> NE.4_1_AC',
'H2 pipeline NG.24_1_AC -> NG.27_1_AC',
'H2 pipeline NG.24_1_AC -> NG.30_1_AC',
'H2 pipeline NG.26_1_AC -> NG.7_1_AC',
'H2 pipeline TZ.10_1_AC -> TZ.15_1_AC',
'H2 pipeline TZ.10_1_AC -> TZ.20_1_AC',
'H2 pipeline TZ.16_1_AC -> TZ.24_1_AC',
'H2 pipeline TZ.16_1_AC -> TZ.6_1_AC'],