SLING-8473 Provide Sling CMS features

fix config extensions
diff --git a/src/main/feature/feature.xml b/src/main/feature/feature.xml
index 66a7133..d5033a3 100644
--- a/src/main/feature/feature.xml
+++ b/src/main/feature/feature.xml
@@ -738,23 +738,23 @@
     <feature version="${project.version}">sling-cms</feature>
   </feature>
   <feature name="sling-cms-author" version="${project.version}">
-    <config external="true" name="org.apache.sling.cms.core.publication.ForwardAgentEndpointSynchronization">classpath:cms/author/org.apache.sling.cms.core.publication.ForwardAgentEndpointSynchronization.json</config>
-    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/author/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.json</config>
-    <config external="true" name="org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default">classpath:cms/author/org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default.json</config>
+    <config external="true" name="org.apache.sling.cms.core.publication.ForwardAgentEndpointSynchronization">classpath:cms/author/org.apache.sling.cms.core.publication.ForwardAgentEndpointSynchronization.config</config>
+    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/author/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.config</config>
+    <config external="true" name="org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default">classpath:cms/author/org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default.config</config>
     <!-- dependencies -->
     <feature version="${project.version}">sling-cms</feature>
   </feature>
   <feature name="sling-cms-renderer" version="${project.version}">
-    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/renderer/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.json</config>
-    <config external="true" name="org.apache.sling.cms.core.publication.PublicationPropertyProvider">classpath:cms/renderer/org.apache.sling.cms.core.publication.PublicationPropertyProvider.json</config>
-    <config external="true" name="org.apache.sling.distribution.packaging.impl.importer.LocalDistributionPackageImporterFactory-default">classpath:cms/renderer/org.apache.sling.distribution.packaging.impl.importer.LocalDistributionPackageImporterFactory-default.json</config>
-    <config external="true" name="org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default">classpath:cms/renderer/org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default.json</config>
+    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/renderer/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.config</config>
+    <config external="true" name="org.apache.sling.cms.core.publication.PublicationPropertyProvider">classpath:cms/renderer/org.apache.sling.cms.core.publication.PublicationPropertyProvider.config</config>
+    <config external="true" name="org.apache.sling.distribution.packaging.impl.importer.LocalDistributionPackageImporterFactory-default">classpath:cms/renderer/org.apache.sling.distribution.packaging.impl.importer.LocalDistributionPackageImporterFactory-default.config</config>
+    <config external="true" name="org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default">classpath:cms/renderer/org.apache.sling.distribution.serialization.impl.vlt.VaultDistributionPackageBuilderFactory-default.config</config>
     <!-- dependencies -->
     <feature version="${project.version}">sling-cms</feature>
   </feature>
   <feature name="sling-cms-standalone" version="${project.version}">
-    <config external="true" name="org.apache.sling.cms.core.internal.filters.CMSSecurityConfigInstance">classpath:cms/standalone/org.apache.sling.cms.core.internal.filters.CMSSecurityConfigInstance.json</config>
-    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/standalone/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.json</config>
+    <config external="true" name="org.apache.sling.cms.core.internal.filters.CMSSecurityConfigInstance">classpath:cms/standalone/org.apache.sling.cms.core.internal.filters.CMSSecurityConfigInstance.config</config>
+    <config external="true" name="org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl">classpath:cms/standalone/org.apache.sling.cms.core.publication.PublicationManagerFactoryImpl.config</config>
     <!-- dependencies -->
     <feature version="${project.version}">sling-cms</feature>
   </feature>