bin/hive script optimization to support use env variable KRB5_CONFIG to specify the krb5.conf filepath

By default, we use the/etc/krb5.conf file

in kinit use env variable KRB5_CONFIG to specify the krb5.conf filepath

in Java use property java.security.krb5.conf to do the above

Can me add a judgment in  bin/hive script

if [ ${KRB5_CONFIG} ]; then

    export HADOOP_CLIENT_OPTS="$HADOOP_CLIENT_OPTS -Djava.security.krb5.conf=${KRB5_CONFIG} "

fi

to add -Djava.security.krb5.conf=${KRB5_CONFIG} in Beeline process param to support use env variable KRB5_CONFIG to specify the krb5.conf filepath  in Beeline