HBASE-22399 Change default hadoop-two.version to 2.8.x and remove the 2.7.x hadoop checks

dev-support/Jenkinsfile

@@ -116,7 +116,7 @@ pipeline {
         }
         stage ('hadoop 2 cache') {
           environment {
-            HADOOP2_VERSION="2.7.1"
+            HADOOP2_VERSION="2.8.2"
           }
           steps {
             // directory must be unique for each parallel stage, because jenkins runs them in the same workspace :(

dev-support/hbase-personality.sh

@@ -504,27 +504,33 @@ function hadoopcheck_rebuild
 
   # All supported Hadoop versions that we want to test the compilation with
   # See the Hadoop section on prereqs in the HBase Reference Guide
-  hbase_common_hadoop2_versions="2.7.1 2.7.2 2.7.3 2.7.4"
   if [[ "${PATCH_BRANCH}" = branch-1.* ]] && [[ "${PATCH_BRANCH#branch-1.}" -lt "5" ]]; then
     yetus_info "Setting Hadoop 2 versions to test based on before-branch-1.5 rules."
     if [[ "${QUICK_HADOOPCHECK}" == "true" ]]; then
-      hbase_hadoop2_versions="2.4.1 2.5.2 2.6.5 2.7.4"
+      hbase_hadoop2_versions="2.4.1 2.5.2 2.6.5 2.7.7"
     else
-      hbase_hadoop2_versions="2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 ${hbase_common_hadoop2_versions}"
+      hbase_hadoop2_versions="2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 2.7.1 2.7.2 2.7.3 2.7.4 2.7.5 2.7.6 2.7.7"
     fi
   elif [[ "${PATCH_BRANCH}" = branch-2.0 ]]; then
     yetus_info "Setting Hadoop 2 versions to test based on branch-2.0 rules."
     if [[ "${QUICK_HADOOPCHECK}" == "true" ]]; then
-      hbase_hadoop2_versions="2.6.5 2.7.4"
+      hbase_hadoop2_versions="2.6.5 2.7.7 2.8.5"
     else
-      hbase_hadoop2_versions="2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 ${hbase_common_hadoop2_versions}"
+      hbase_hadoop2_versions="2.6.1 2.6.2 2.6.3 2.6.4 2.6.5 2.7.1 2.7.2 2.7.3 2.7.4 2.7.5 2.7.6 2.7.7 2.8.2 2.8.3 2.8.4 2.8.5"
+    fi
+  elif [[ "${PATCH_BRANCH}" = branch-2.1 ]]; then
+    yetus_info "Setting Hadoop 2 versions to test based on branch-2.1 rules."
+    if [[ "${QUICK_HADOOPCHECK}" == "true" ]]; then
+      hbase_hadoop2_versions="2.7.7 2.8.5"
+    else
+      hbase_hadoop2_versions="2.7.1 2.7.2 2.7.3 2.7.4 2.7.5 2.7.6 2.7.7 2.8.2 2.8.3 2.8.4 2.8.5"
     fi
   else
     yetus_info "Setting Hadoop 2 versions to test based on branch-1.5+/branch-2.1+/master/feature branch rules."
     if [[ "${QUICK_HADOOPCHECK}" == "true" ]]; then
-      hbase_hadoop2_versions="2.7.4"
+      hbase_hadoop2_versions="2.8.5 2.9.2"
     else
-      hbase_hadoop2_versions="${hbase_common_hadoop2_versions}"
+      hbase_hadoop2_versions="2.8.2 2.8.3 2.8.4 2.8.5 2.9.1 2.9.2"
     fi
   fi
   hbase_hadoop3_versions="3.0.0"

hbase-client/src/test/java/org/apache/hadoop/hbase/client/TestReversedScannerCallable.java

@@ -57,13 +57,10 @@ public class TestReversedScannerCallable {
 
   @Before
   public void setUp() throws Exception {
-    byte[] ROW_BEFORE = ConnectionUtils.createCloseRowBefore(ROW);
-
-    Configuration conf = Mockito.mock(Configuration.class);
     HRegionLocation regionLocation = Mockito.mock(HRegionLocation.class);
     ServerName serverName = Mockito.mock(ServerName.class);
 
-    Mockito.when(connection.getConfiguration()).thenReturn(conf);
+    Mockito.when(connection.getConfiguration()).thenReturn(new Configuration());
     Mockito.when(regionLocations.size()).thenReturn(1);
     Mockito.when(regionLocations.getRegionLocation(0)).thenReturn(regionLocation);
     Mockito.when(regionLocation.getHostname()).thenReturn("localhost");

pom.xml

@@ -1412,7 +1412,7 @@
     <maven.min.version>3.0.4</maven.min.version>
     <java.min.version>${compileSource}</java.min.version>
     <!-- Dependencies -->
-    <hadoop-two.version>2.7.7</hadoop-two.version>
+    <hadoop-two.version>2.8.5</hadoop-two.version>
     <hadoop-three.version>3.0.3</hadoop-three.version>
     <!-- These must be defined here for downstream build tools that don't look at profiles.
          They ought to match the values found in our default hadoop profile, which is
@@ -2658,6 +2658,16 @@
             <groupId>org.apache.hadoop</groupId>
             <artifactId>hadoop-auth</artifactId>
 	    <version>${hadoop-two.version}</version>
+            <exclusions>
+              <exclusion>
+                <groupId>com.google.guava</groupId>
+                <artifactId>guava</artifactId>
+              </exclusion>
+              <exclusion>
+                <groupId>net.minidev</groupId>
+                <artifactId>json-smart</artifactId>
+              </exclusion>
+            </exclusions>
           </dependency>
           <dependency>
             <groupId>org.apache.hadoop</groupId>