[SPARK-15053][BUILD] Fix Java Lint errors on Hive-Thriftserver module

## What changes were proposed in this pull request?

This issue fixes or hides 181 Java linter errors introduced by SPARK-14987 which copied hive service code from Hive. We had better clean up these errors before releasing Spark 2.0.

- Fix UnusedImports (15 lines), RedundantModifier (14 lines), SeparatorWrap (9 lines), MethodParamPad (6 lines), FileTabCharacter (5 lines), ArrayTypeStyle (3 lines), ModifierOrder (3 lines), RedundantImport (1 line), CommentsIndentation (1 line), UpperEll (1 line), FallThrough (1 line), OneStatementPerLine (1 line), NewlineAtEndOfFile (1 line) errors.
- Ignore `LineLength` errors under `hive/service/*` (118 lines).
- Ignore `MethodName` error in `PasswdAuthenticationProvider.java` (1 line).
- Ignore `NoFinalizer` error in `ThreadWithGarbageCleanup.java` (1 line).

## How was this patch tested?

After passing Jenkins building, run `dev/lint-java` manually.
```bash
$ dev/lint-java
Checkstyle checks passed.
```

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #12831 from dongjoon-hyun/SPARK-15053.

1 files changed, 4 insertions, 5 deletions

diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/thrift/ThriftHttpServlet.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/thrift/ThriftHttpServlet.java
index 56c8cb6e54..e15d2d0566 100644
--- a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/thrift/ThriftHttpServlet.java
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/cli/thrift/ThriftHttpServlet.java
@@ -21,7 +21,6 @@ package org.apache.hive.service.cli.thrift;
 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.security.PrivilegedExceptionAction;
-import java.util.Arrays;
 import java.util.Map;
 import java.util.Random;
 import java.util.Set;
@@ -241,9 +240,9 @@ public class ThriftHttpServlet extends TServlet {
    * Each cookie is of the format [key]=[value]
    */
   private String toCookieStr(Cookie[] cookies) {
-	String cookieStr = "";
+    String cookieStr = "";
 
-	for (Cookie c : cookies) {
+    for (Cookie c : cookies) {
      cookieStr += c.getName() + "=" + c.getValue() + " ;\n";
     }
     return cookieStr;
@@ -458,7 +457,7 @@ public class ThriftHttpServlet extends TServlet {
 
   private String getUsername(HttpServletRequest request, String authType)
       throws HttpAuthenticationException {
-    String creds[] = getAuthHeaderTokens(request, authType);
+    String[] creds = getAuthHeaderTokens(request, authType);
     // Username must be present
     if (creds[0] == null || creds[0].isEmpty()) {
       throw new HttpAuthenticationException("Authorization header received " +
@@ -469,7 +468,7 @@ public class ThriftHttpServlet extends TServlet {
 
   private String getPassword(HttpServletRequest request, String authType)
       throws HttpAuthenticationException {
-    String creds[] = getAuthHeaderTokens(request, authType);
+    String[] creds = getAuthHeaderTokens(request, authType);
     // Password must be present
     if (creds[1] == null || creds[1].isEmpty()) {
       throw new HttpAuthenticationException("Authorization header received " +