Remove beta1 qualifier (#329) (#330)

(cherry picked from commit b234048)

Signed-off-by: Peter Zhu <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

build.gradle

@@ -10,7 +10,7 @@ buildscript {
   ext {
     opensearch_version = System.getProperty("opensearch.version", "3.0.0-beta1-SNAPSHOT")
     isSnapshot = "true" == System.getProperty("build.snapshot", "true")
-    buildVersionQualifier = System.getProperty("build.version_qualifier", "beta1")
+    buildVersionQualifier = System.getProperty("build.version_qualifier", "")
     version_tokens = opensearch_version.tokenize('-')
     opensearch_build = version_tokens[0] + '.0'
     if (buildVersionQualifier) {