updated peer test site files and gmm trees

etc/peer/models/Set2-Case2a-fast/active-crust/gmm-tree.json

etc/peer/models/Set2-Case2a-fast/sites.csv

etc/peer/models/Set2-Case2a/active-crust/gmm-tree.json

etc/peer/models/Set2-Case2a/sites.csv

etc/peer/models/Set2-Case2b-fast/sites.csv

etc/peer/models/Set2-Case2b/sites.csv

etc/peer/models/Set2-Case2c-fast/sites.csv

etc/peer/models/Set2-Case2c/sites.csv

etc/peer/models/Set2-Case2d-fast/active-crust/gmm-tree.json

etc/peer/models/Set2-Case2d-fast/sites.csv

etc/peer/models/Set2-Case2d/sites.csv

etc/peer/models/Set2-Case3a-fast/sites.csv

etc/peer/models/Set2-Case3a/sites.csv

etc/peer/models/Set2-Case3b-fast/sites.csv

etc/peer/models/Set2-Case3b/sites.csv

etc/peer/models/Set2-Case3c-fast/sites.csv

etc/peer/models/Set2-Case3c/sites.csv

etc/peer/models/Set2-Case3d-fast/sites.csv

etc/peer/models/Set2-Case3d/sites.csv

etc/peer/models/Set2-Case4a-fast/sites.csv