[OPENJDK-528] rework singleton-jdk to use a single RPM transaction

This prevents a bug where stray empty directories from JDK packages
remain after removal.

Signed-off-by: Jonathan Dowland <[email protected]>

Author: jmtd

modules/singleton-jdk/configure.sh

@@ -13,8 +13,4 @@ fi
 
 # Clean up any java-* packages that have been installed that do not match
 # our stated JAVA_VERSION-JAVA_VENDOR (e.g.: 11-openjdk; 1.8.0-openj9)
-rpm -qa java-\* | while read pkg; do
-    if ! echo "$pkg" | grep -q "^java-${JAVA_VERSION}-${JAVA_VENDOR}"; then
-        rpm -e --nodeps "$pkg"
-    fi
-done
+rpm -e --nodeps $(rpm -qa java-* | grep -v "^java-${JAVA_VERSION}-${JAVA_VENDOR}")