correct FROM & switch to rpm instead of rpm-ndb

OBS-URL: https://build.opensuse.org/package/show/devel:BCI:Tumbleweed/minimal-image?expand=0&rev=2

minimal-image.kiwi

@@ -11,7 +11,7 @@
     <specification>SLE BCI %OS_VERSION% Minimal Container Image</specification>
   </description>
   <preferences>
-    <type image="docker" derived_from="obsrepositories:/bci/bci-micro#Tumbleweed">
+    <type image="docker" derived_from="obsrepositories:/bci/bci-micro#latest">
       <containerconfig
           name="bci/bci-minimal"
           tag="%OS_VERSION_ID_SP%"
@@ -57,7 +57,7 @@
     <package name="libzio1"/>
   </packages>
   <packages type="bootstrap">
-    <package name="rpm-ndb"/>
+    <package name="rpm"/>
     <package name="perl-base"/>
     <package name="distribution-release"/>
   </packages>