HDDS-12949. Cleanup SCMSafeModeManager (apache#8390)

Author: nandakumar131

hadoop-hdds/server-scm/src/main/java/org/apache/hadoop/hdds/scm/ha/SCMContext.java

@@ -72,7 +72,7 @@ public final class SCMContext {
   private SCMContext(Builder b) {
     isLeader = b.isLeader;
     term = b.term;
-    safeModeStatus = new SafeModeStatus(b.isInSafeMode, b.isPreCheckComplete);
+    safeModeStatus = SafeModeStatus.of(b.isInSafeMode, b.isPreCheckComplete);
     finalizationCheckpoint = b.finalizationCheckpoint;
     scm = b.scm;
     threadNamePrefix = b.threadNamePrefix;