Fix shebang

/bin/env doesn't exist on ubuntu 18.04

Author: jan-cerny

tests/probes/rpm/rpmverify/test_probes_rpmverify_not_equals_operation.sh

@@ -1,4 +1,4 @@
-#!/bin/env bash
+#!/usr/bin/env bash
 
 . $builddir/tests/test_common.sh
 

tests/probes/rpm/rpmverify/test_probes_rpmverify_not_equals_operation_offline.sh

@@ -1,4 +1,4 @@
-#!/bin/env bash
+#!/usr/bin/env bash
 
 . $builddir/tests/test_common.sh
 . $srcdir/../rpm_common.sh

tests/probes/rpm/rpmverifypackage/rpmverifypackage.xml.sh

@@ -1,4 +1,4 @@
-#!/bin/env bash
+#!/usr/bin/env bash
 
 # This template generates OVAL definitions for rpmverifypackage_object.