The number of realizations generated by the engine is not right

[Michele Simionato]

This is important since it is confusing our sponsors. The case at hand is the Germany computation for Hannover RE. They use the SHARE model which has 3 source models.

Source model #1: 4 tectonic region types, 1 x 2 x 4 x 5 = 40 realizations
Volcanic FaccioliEtAl2010
Shield Campbell2003SHARE,ToroEtAl2002SHARE
Active Shallow Crust AkkarBommer2010,CauzziFaccioli2008,ChiouYoungs2008,ZhaoEtAl2006Asc
Stable Shallow Crust AkkarBommer2010,Campbell2003SHARE,CauzziFaccioli2008,ChiouYoungs2008,ToroEtAl2002SHARE

Source model #2: 2 tectonic region types, 4x5 = 20 realizations
Active Shallow Crust AkkarBommer2010,CauzziFaccioli2008,ChiouYoungs2008,ZhaoEtAl2006Asc
Stable Shallow Crust AkkarBommer2010,Campbell2003SHARE,CauzziFaccioli2008,ChiouYoungs2008,ToroEtAl2002SHARE

Source model #3: 4 tectonic region types, 1 x 2 x 4 x 5 = 40 realizations
Volcanic FaccioliEtAl2010
Shield Campbell2003SHARE,ToroEtAl2002SHARE
Active Shallow Crust AkkarBommer2010,CauzziFaccioli2008,ChiouYoungs2008,ZhaoEtAl2006Asc
Stable Shallow Crust AkkarBommer2010,Campbell2003SHARE,CauzziFaccioli2008,ChiouYoungs2008,ToroEtAl2002SHARE

40+20+40 = 100 realizations should be generated, but the engine is generating 120 realizations.

[Michele Simionato (michele-simionato)]

https://github.com/gem/oq-engine/pull/1447
https://github.com/gem/oq-commonlib/pull/9