Fix review comments for indices filter feature

Signed-off-by: nhuttran <truong.nhut_tran.ext@nokia.com>

Author: nhuttran

README.md

@@ -141,12 +141,13 @@ prometheus.nodes.filter: "_all"
 
 #### Indices filter
 
-Prometheus exporter can be configured to filter indices statistics with indices starting with prefixes.
+Prometheus exporter can be configured to filter indices statistics from selected indices.
+To target all indices, use '' or * or _all
 Default value: `""`.
 
-For example to filter indices statistics with indices starting with prefixes such as logs, alarms:
+For example to filter indices statistics:
 ```
-prometheus.indices_filter: "logs-*,alarms*"
+prometheus.indices_filter: "log-*,*log,*log*,log*-test"
 ```
 
 ## Usage

build.gradle

@@ -3,39 +3,8 @@ import org.opensearch.gradle.test.RestIntegTestTask
 import java.util.regex.Matcher
 import java.util.regex.Pattern
 
-apply plugin: 'java'
-apply plugin: 'idea'
-apply plugin: 'opensearch.opensearchplugin'
-apply plugin: 'opensearch.yaml-rest-test'
-
-def pluginName = pluginName
-def pluginDescription = pluginDescription
-//def projectPath = 'org.opensearch'
-//def pathToPlugin = 'path.to.plugin'
-def pluginClassName = pluginClassname
-
-opensearchplugin {
-    name pluginName
-    description pluginDescription
-//    classname "${projectPath}.${pathToPlugin}.${pluginClassName}"
-    classname pluginClassName
-    licenseFile rootProject.file('LICENSE.txt')
-    noticeFile rootProject.file('NOTICE.txt')
-}
-
-// thirdparty audit needs can be enabled
-thirdPartyAudit.enabled = false
-
-// This requires an additional Jar not published as part of build-tools
-loggerUsageCheck.enabled = false
-
-// No need to validate pom, as we do not upload to maven/sonatype
-validateNebulaPom.enabled = false
-
 buildscript {
-
     ext {
-
         // Four {digit(s)} concatenated with a "." followed by -rc{digit(s)}
         // Examples: 1.0.0.1-rc2, 2.10.4.0-rc5
         // Group (3) refers to the last .{digit{(s)} pattern (this is what we want to remove for OpS version)
@@ -49,7 +18,6 @@ buildscript {
         String opensearch_version
         String plugin_version = version
 
-
         Matcher rc_matcher = RC_pattern.matcher(plugin_version)
         Matcher other_matcher = OTHER_pattern.matcher(plugin_version)
 
@@ -83,6 +51,36 @@ buildscript {
     }
 }
 
+apply plugin: 'java'
+apply plugin: 'idea'
+apply plugin: 'opensearch.opensearchplugin'
+apply plugin: 'opensearch.yaml-rest-test'
+//apply plugin: 'checkstyle'
+
+def pluginName = pluginName
+def pluginDescription = pluginDescription
+//def projectPath = 'org.opensearch'
+//def pathToPlugin = 'path.to.plugin'
+def pluginClassName = pluginClassname
+
+opensearchplugin {
+    name pluginName
+    description pluginDescription
+//    classname "${projectPath}.${pathToPlugin}.${pluginClassName}"
+    classname pluginClassName
+    licenseFile rootProject.file('LICENSE.txt')
+    noticeFile rootProject.file('NOTICE.txt')
+}
+
+// thirdparty audit needs can be enabled
+thirdPartyAudit.enabled = false
+
+// This requires an additional Jar not published as part of build-tools
+loggerUsageCheck.enabled = false
+
+// No need to validate pom, as we do not upload to maven/sonatype
+validateNebulaPom.enabled = false
+
 repositories {
     mavenLocal()
     maven { url "https://aws.oss.sonatype.org/content/repositories/releases" }