Remove beta1 qualifier (#1838)

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

Author: peterzhuamazon

build.gradle

@@ -8,7 +8,7 @@ buildscript {
 
     ext {
         opensearch_version = System.getProperty("opensearch.version", "3.0.0-SNAPSHOT")
-        buildVersionQualifier = System.getProperty("build.version_qualifier", "beta1")
+        buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         // 3.0.0-SNAPSHOT -> 3.0.0.0-SNAPSHOT
         version_tokens = opensearch_version.tokenize('-')