Adding LDAP support for Keystone charm

Change-Id: Ic07622ef2332943479d1e9212f9d968ba6554ead
Signed-off-by: sousaedu <eduardo.sousa@canonical.com>
diff --git a/installers/charm/build.sh b/installers/charm/build.sh
index 5d1c868..1c017ba 100755
--- a/installers/charm/build.sh
+++ b/installers/charm/build.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Copyright 2020 Canonical Ltd.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -11,8 +12,9 @@
 #     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #     See the License for the specific language governing permissions and
 #     limitations under the License.
-#!/bin/bash
+
 set -eux
+
 function build() {
     cd $1 && tox -e build && cd ..
 }