Revert "Switch to template-feature-parent"

This reverts commit 257ce19, as
gpg-maven-plugin is failing to sign the resulting feature.

Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

Author: rovarga

pt-triemap/pom.xml

@@ -20,7 +20,7 @@
 
     <parent>
         <groupId>org.opendaylight.odlparent</groupId>
-        <artifactId>template-feature-parent</artifactId>
+        <artifactId>single-feature-parent</artifactId>
         <version>13.1.5</version>
         <relativePath />
     </parent>