Fixing Imports (#764)

Signed-off-by: Varun Jain <varunudr@amazon.com>
(cherry picked from commit 0661586)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

src/main/java/org/opensearch/sdk/api/ActionExtension.java

@@ -18,7 +18,7 @@
 import org.opensearch.action.support.ActionFilter;
 import org.opensearch.action.support.TransportAction;
 import org.opensearch.action.support.TransportActions;
-import org.opensearch.common.Strings;
+import org.opensearch.core.common.Strings;
 import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.rest.RestHeaderDefinition;
 import org.opensearch.sdk.Extension;

src/main/java/org/opensearch/sdk/ssl/util/SSLCertificateHelper.java

@@ -11,7 +11,7 @@
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.opensearch.common.Strings;
+import org.opensearch.core.common.Strings;
 
 import java.security.Key;
 import java.security.KeyStore;