Truncate dbshell output (#283)

Truncate dbshell output

dbshell prints a line with the fields name when using MySQL.
Using `tail -n1` fixes the issue.

tasks/configure.yml

@@ -25,7 +25,7 @@
 - name: "Get SS API Key"
   shell: >
     echo "select \`key\` from tastypie_apikey where id in (select id from auth_user where username = '{{ archivematica_src_configure_ss_user }}');"
-    | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell
+    | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell | tail -n1
   args:
     chdir: "{{ archivematica_src_ss_app }}"
     executable: /bin/bash
@@ -41,7 +41,7 @@
 
 - name: "Check for default SS user"
   become: "yes"
-  shell: echo 'select username from auth_user where (id=1 and last_login is NULL and first_name="" and last_name="" and email="[email protected]" and username="test");'  | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell
+  shell: echo 'select username from auth_user where (id=1 and last_login is NULL and first_name="" and last_name="" and email="[email protected]" and username="test");'  | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell | tail -n1
   args:
     chdir: "{{ archivematica_src_ss_app }}"
     executable: /bin/bash
@@ -66,7 +66,7 @@
 
 - name: "Check for SS user"
   become: "yes"
-  shell: echo 'select username from auth_user where username="{{ archivematica_src_configure_ss_user }}";'  | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell
+  shell: echo 'select username from auth_user where username="{{ archivematica_src_configure_ss_user }}";'  | {{ archivematica_src_ss_virtualenv }}/bin/python manage.py dbshell | tail -n1
   args:
     chdir: "{{ archivematica_src_ss_app }}"
     executable: /bin/bash