Remove beta1 qualifier (#1417)

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

Author: peterzhuamazon

build.gradle

@@ -27,7 +27,7 @@ buildscript {
     ext {
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         opensearch_version = System.getProperty("opensearch.version", "3.0.0-SNAPSHOT")
-        buildVersionQualifier = System.getProperty("build.version_qualifier", "beta1")
+        buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         // 2.2.0-SNAPSHOT -> 2.2.0.0-SNAPSHOT
         version_tokens = opensearch_version.tokenize('-')
         opensearch_build = version_tokens[0] + '.0'