Bump args4j version to 2.0.26

New version has features which be useful for Gerrit core and plugins:

* new hidden attribute, specifying to hide it in help message
* new depends attribute, specifying the dependent option(s)
* multiValued attribute was removed

Change-Id: Ic7e9f37231cb83940db50fe3b9efe8ad972108cf

gerrit-util-cli/src/main/java/com/google/gerrit/util/cli/CmdLineParser.java

@@ -52,10 +52,13 @@ import org.kohsuke.args4j.spi.BooleanOptionHandler;
 import org.kohsuke.args4j.spi.EnumOptionHandler;
 import org.kohsuke.args4j.spi.OptionHandler;
 import org.kohsuke.args4j.spi.Setter;
+import org.kohsuke.args4j.spi.FieldSetter;
+
 
 import java.io.StringWriter;
 import java.io.Writer;
 import java.lang.annotation.Annotation;
+import java.lang.reflect.AnnotatedElement;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -380,6 +383,16 @@ public class CmdLineParser {
       return new String[] {"-h"};
     }
 
+    @Override
+    public String[] depends() {
+      return new String[] {};
+    }
+
+    @Override
+    public boolean hidden() {
+      return false;
+    }
+
     @Override
     public String usage() {
       return "display this help text";
@@ -400,11 +413,6 @@ public class CmdLineParser {
       return "";
     }
 
-    @Override
-    public boolean multiValued() {
-      return false;
-    }
-
     @Override
     public boolean required() {
       return false;
@@ -415,6 +423,16 @@ public class CmdLineParser {
       return Option.class;
     }
 
+    @Override
+    public FieldSetter asFieldSetter() {
+      throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public AnnotatedElement asAnnotatedElement() {
+      throw new UnsupportedOperationException();
+    }
+
     @Override
     public Class<Boolean> getType() {
       return Boolean.class;
@@ -422,7 +440,7 @@ public class CmdLineParser {
 
     @Override
     public boolean isMultiValued() {
-      return multiValued();
+      return false;
     }
   }
 }