Updated the ENV var name
Issue-ID: DCAEGEN2-1483
Change-Id: I5b72daea036f79472d8295fef92f322cf03b26c6
Signed-off-by: jegadeeshbabu1 <jegabab1@in.ibm.com>
     public static final String CONFIG_BINDING_SERVICE_ENV_VARIABLE_KEY = "CONFIG_BINDING_SERVICE";
     public static final String CONFIG_BINDING_SERVICE_ENV_VARIABLE_VALUE =
             System.getenv(CONFIG_BINDING_SERVICE_ENV_VARIABLE_KEY);
-    public static final String SERVICE_NAME_ENV_VARIABLE_KEY = "SERVICE_NAME";
+    public static final String SERVICE_NAME_ENV_VARIABLE_KEY = "HOSTNAME";
     public static final String SERVICE_NAME_ENV_VARIABLE_VALUE = System.getenv(SERVICE_NAME_ENV_VARIABLE_KEY);
     public static final String CONSUL_QUERY_URL_STRING = String.format("http://%s:8500/v1/catalog/service/%s",
             CONSUL_HOST_ENV_VARIABLE_VALUE, CONFIG_BINDING_SERVICE_ENV_VARIABLE_VALUE);