Remove beta1 qualifier (#329)

Signed-off-by: Peter Zhu <[email protected]>

Author: peterzhuamazon

build.gradle

@@ -10,7 +10,7 @@ buildscript {
   ext {
     opensearch_version = System.getProperty("opensearch.version", "3.0.0-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) {