[NC-1581] Remove SyncMode CLI flag (#27)

* comment out the @Option annotation

* eliminate syncModeOptionMustBeUsed

* update to OverrideDefaultValuesIfKeyIsPresentInConfigFile

* unify on comment out approach

pantheon/src/main/java/net/consensys/pantheon/cli/PantheonCommand.java

@@ -182,12 +182,14 @@ public class PantheonCommand implements Runnable {
   )
   private final Integer maxTrailingPeers = Integer.MAX_VALUE;
 
-  @Option(
-    names = {"--sync-mode"},
-    paramLabel = MANDATORY_MODE_FORMAT_HELP,
-    description =
-        "Synchronization mode (Value can be one of ${COMPLETION-CANDIDATES}, default: ${DEFAULT-VALUE})"
-  )
+  // TODO: Re-enable as per NC-1057/NC-1681
+  //  @Option(
+  //    names = {"--sync-mode"},
+  //    paramLabel = MANDATORY_MODE_FORMAT_HELP,
+  //    description =
+  //        "Synchronization mode (Value can be one of ${COMPLETION-CANDIDATES}, default:
+  // ${DEFAULT-VALUE})"
+  //  )
   private final SyncMode syncMode = DEFAULT_SYNC_MODE;
 
   // Boolean option to indicate if the client have to sync against the ottoman test network

pantheon/src/test/java/net/consensys/pantheon/cli/PantheonCommandTest.java

@@ -34,6 +34,7 @@ import java.util.Optional;
 import com.google.common.collect.Lists;
 import com.google.common.io.Resources;
 import org.junit.Before;
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -227,7 +228,8 @@ public class PantheonCommandTest extends CommandTestAbstract {
             anyBoolean(),
             anyInt());
 
-    verify(mockSyncConfBuilder).syncMode(ArgumentMatchers.eq(SyncMode.FAST));
+    // TODO: Re-enable as per NC-1057/NC-1681
+    // verify(mockSyncConfBuilder).syncMode(ArgumentMatchers.eq(SyncMode.FAST));
 
     assertThat(commandErrorOutput.toString()).isEmpty();
 
@@ -257,7 +259,8 @@ public class PantheonCommandTest extends CommandTestAbstract {
     verify(mockControllerBuilder)
         .build(any(), eq(null), any(), eq(false), any(), eq(false), anyInt());
 
-    verify(mockSyncConfBuilder).syncMode(ArgumentMatchers.eq(SyncMode.FULL));
+    // TODO: Re-enable as per NC-1057/NC-1681
+    // verify(mockSyncConfBuilder).syncMode(ArgumentMatchers.eq(SyncMode.FULL));
 
     assertThat(commandErrorOutput.toString()).isEmpty();
 
@@ -408,6 +411,7 @@ public class PantheonCommandTest extends CommandTestAbstract {
     assertThat(commandErrorOutput.toString()).isEmpty();
   }
 
+  @Ignore
   @Test
   public void syncModeOptionMustBeUsed() {