keep just MSL 3.2.3 and 4.1.0 to check coverage (#207)

Author: adrpo

.CI/installLibraries.mos

@@ -2,10 +2,6 @@
 //        usually the newest version will be loaded instead if you remove them!
 //        SO: first remove them from configs/conf* then remove them from here.
 updatePackageIndex();
-if not installPackage(Modelica, "3.1.0", exactMatch=true) then
-    print("Modelica 3.1.0 " + getErrorString() + "\n");
-    exit(1);
-end if;
 if not installPackage(Modelica, "4.1.0-beta.om", exactMatch=true) then
     print("Modelica 4.1.0-beta.om" + getErrorString() + "\n");
     exit(1);
@@ -14,7 +10,11 @@ if not installPackage(ModelicaServices, "4.1.0-beta.om", exactMatch=true) then
     print("ModelicaServices 4.1.0-beta.om" + getErrorString() + "\n");
     exit(1);
 end if;
-for v in {"3.2.1","3.2.2","3.2.3","4.0.0","4.1.0-beta.om","trunk"} loop
+if not installPackage(ModelicaServices, "trunk", exactMatch=true) then
+    print("ModelicaServices trunk" + getErrorString() + "\n");
+    exit(1);
+end if;
+for v in {"3.2.3","4.1.0-beta.om"} loop
   if not installPackage(ModelicaTest, v, exactMatch=true) then
     print("ModelicaTest " + v + " " + getErrorString() + "\n");
     exit(1);