fix typo

Author: meihuisu

test/run_unit

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if [[ ! -z "${UCVM_INSTALL_PATH}"]; then
+if [[ ! -z "${UCVM_INSTALL_PATH}"]]; then
   if [[ -d ${UCVM_INSTALL_PATH}/conf/ucvm_env.sh ]]; then
      source ${UCVM_INSTALL_PATH}/conf/ucvm_env.sh
      ./unittest