HDDS-11782. ozone debug ldb --with-keys defaults to false instead of true (apache#7521)

Author: Tejaskriya

hadoop-ozone/dist/src/main/smoketest/debug/ozone-debug-ldb.robot

@@ -55,6 +55,16 @@ Test ozone debug ldb scan
                         Should contain          ${output}       testfile1
                         Should contain          ${output}       testfile2
                         Should contain          ${output}       testfile3
+    # test key is included with --with-keys
+    ${output1} =        Execute                 ozone debug ldb --db=/data/metadata/om.db scan --cf=keyTable | jq '."\/cli-debug-volume\/cli-debug-bucket\/testfile1"'
+    ${output2} =        Execute                 ozone debug ldb --db=/data/metadata/om.db scan --cf=keyTable --with-keys | jq '."\/cli-debug-volume\/cli-debug-bucket\/testfile1"'
+    ${output3} =        Execute                 ozone debug ldb --db=/data/metadata/om.db scan --cf=keyTable --with-keys=true | jq '."\/cli-debug-volume\/cli-debug-bucket\/testfile1"'
+                        Should contain          ${output1}      testfile1
+                        Should Be Equal         ${output1}      ${output2}
+                        Should Be Equal         ${output1}      ${output3}
+    # test key is ommitted with --with-keys set to false
+    ${output} =         Execute and Ignore Error                ozone debug ldb --db=/data/metadata/om.db scan --cf=keyTable --with-keys=false | jq '."\/cli-debug-volume\/cli-debug-bucket\/testfile1"'
+                        Should contain          ${output}       Cannot index array with string
     # test startkey option
     ${output} =         Execute                 ozone debug ldb --db=/data/metadata/om.db scan --cf=keyTable --startkey="/cli-debug-volume/cli-debug-bucket/testfile2"
                         Should not contain      ${output}       testfile1

hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/debug/ldb/DBScanner.java

@@ -109,7 +109,7 @@ public class DBScanner implements Callable<Void>, SubcommandWithParent {
   @CommandLine.Option(names = {"--with-keys"},
       description = "Print a JSON object of key->value pairs (default)"
           + " instead of a JSON array of only values.",
-      defaultValue = "true")
+      defaultValue = "true", fallbackValue = "true")
   private boolean withKey;
 
   @CommandLine.Option(names = {"--length", "--limit", "-l"},