Pull OpenSearch test images from ECR Public registry (#22)

Use public.ecr.aws/opensearchproject/opensearch for the Testcontainers
image in the OpenSearch client tests instead of the Docker Hub image,
to avoid Docker Hub rate limits during CI.

Author: marevol

src/test/java/org/codelibs/fesen/client/OpenSearch1ClientTest.java

@@ -113,7 +113,7 @@ class OpenSearch1ClientTest {
 
     static final String version = "1.3.20";
 
-    static final String imageTag = "opensearchproject/opensearch:" + version;
+    static final String imageTag = "public.ecr.aws/opensearchproject/opensearch:" + version;
 
     static String clusterName = "docker-cluster";
 

src/test/java/org/codelibs/fesen/client/OpenSearch2ClientTest.java

@@ -113,7 +113,7 @@ class OpenSearch2ClientTest {
 
     static final String version = "2.19.4";
 
-    static final String imageTag = "opensearchproject/opensearch:" + version;
+    static final String imageTag = "public.ecr.aws/opensearchproject/opensearch:" + version;
 
     static String clusterName = "docker-cluster";
 

src/test/java/org/codelibs/fesen/client/OpenSearch3ClientTest.java

@@ -113,7 +113,7 @@ class OpenSearch3ClientTest {
 
     static final String version = "3.5.0";
 
-    static final String imageTag = "opensearchproject/opensearch:" + version;
+    static final String imageTag = "public.ecr.aws/opensearchproject/opensearch:" + version;
 
     static String clusterName = "docker-cluster";