Installer now activates mappings correctly. Also sets %All namespace databases to CACHETEMP and Samples namespace databases to SAMPLES.

P.S. With thanks to @Sergey Sarkisyan

Author: eduard93

MDX2JSON/Installer.cls.xml

@@ -44,18 +44,18 @@ todo add optional parameter WEBAPP to Alter web app name if it needs to have ano
 <If Condition='(##class(Config.Namespaces).Exists("%All")=0)'>
 <Log Text="Creating namespace %All" Level="0"/>
 <Namespace Name="%All" Create="yes" Code="CACHETEMP" Data="CACHETEMP" Ensemble="0">
-<Configuration/>
+<Configuration>
+	<Log Text="Mapping MDX2JSON package to %All namespace" Level="0"/>
+	<ClassMapping From="${Namespace}" Package="MDX2JSON"/> 
+</Configuration>
 </Namespace>
 </If>
 
-<Log Text="Mapping MDX2JSON package to %All namespace" Level="0"/>
-<Namespace Name="%All" Create="no">
-<ClassMapping From="${Namespace}" Package="MDX2JSON"/> 
-</Namespace>
-
 <Log Text="Mapping MDX2JSON package to Samples namespace" Level="0"/>
-<Namespace Name="Samples" Create="no">
+<Namespace Name="Samples" Create="no" Code="SAMPLES" Data="SAMPLES" Ensemble="0">
+<Configuration>
 <ClassMapping From="${Namespace}" Package="MDX2JSON"/> 
+</Configuration>
 </Namespace>
 	
 <IfDef Var="User" >