update expected Kubernetes versions to 1.10.11+, 1.11.5+, 1.12.3+

Author: russgold

operator/src/main/java/oracle/kubernetes/operator/helpers/HealthCheckHelper.java

@@ -65,8 +65,6 @@ public final class HealthCheckHelper {
   // default namespace or svc account name
   private static final String DEFAULT_NAMESPACE = "default";
 
-  private static final String MINIMUM_K8S_VERSION = "v1.7.5";
-
   static {
     // CRUD resources
     namespaceAccessChecks.put(AuthorizationProxy.Resource.PODS, crudOperations);

operator/src/main/java/oracle/kubernetes/operator/helpers/KubernetesVersion.java

@@ -10,7 +10,7 @@
 /** Major and minor version of Kubernetes API Server */
 public class KubernetesVersion {
   static KubernetesVersion UNREADABLE = new KubernetesVersion(0, 0);
-  private static final String[] MINIMUM_K8S_VERSIONS = {"1.7.5"};
+  private static final String[] MINIMUM_K8S_VERSIONS = {"1.10.11", "1.11.5", "1.12.3"};
 
   private final int major;
   private final int minor;

operator/src/test/java/oracle/kubernetes/operator/helpers/VersionCheckTest.java

@@ -84,10 +84,14 @@ public static Collection<Object[]> data() {
           {VERSION_TEST, "0", "", "", returnsVersion(0, 0), ignoring(K8S_VERSION_TOO_LOW)},
           {LOG_MSG_TEST, "0", "", "", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
           {LOG_MSG_TEST, "1", "6+", "", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
-          {LOG_MSG_TEST, "1", "7", "1+coreos.0", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
-          {LOG_MSG_TEST, "1", "7", "5+coreos.0", containsInfo(K8S_VERSION_CHECK), noIgnores()},
-          {VERSION_TEST, "1", "8", "3", returnsVersion(1, 8), ignoring(K8S_VERSION_CHECK)},
-          {LOG_MSG_TEST, "1", "8", "3", containsInfo(K8S_VERSION_CHECK), noIgnores()},
+          {LOG_MSG_TEST, "1", "10", "1+cor.0", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
+          {LOG_MSG_TEST, "1", "10", "11", containsInfo(K8S_VERSION_CHECK), noIgnores()},
+          {LOG_MSG_TEST, "1", "11", "4", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
+          {LOG_MSG_TEST, "1", "11", "6", containsInfo(K8S_VERSION_CHECK), noIgnores()},
+          {LOG_MSG_TEST, "1", "12", "2", containsWarning(K8S_VERSION_TOO_LOW), noIgnores()},
+          {LOG_MSG_TEST, "1", "12", "3", containsInfo(K8S_VERSION_CHECK), noIgnores()},
+          {VERSION_TEST, "1", "13", "3", returnsVersion(1, 13), ignoring(K8S_VERSION_CHECK)},
+          {LOG_MSG_TEST, "1", "13", "3", containsInfo(K8S_VERSION_CHECK), noIgnores()},
           {VERSION_TEST, "2", "7", "", returnsVersion(2, 7), ignoring(K8S_VERSION_CHECK)},
           {LOG_MSG_TEST, "2", "", "", containsInfo(K8S_VERSION_CHECK), noIgnores()},
         });