devstack should put admin_tenant_id in tempest.conf file while setup

Some of the test cases in tempest related to quota use
admin_tenant_name, ideally it should use admin_tenant_id.
As tempest.conf file does not contains admin_tenant_id
it should also be updated. tempest.conf file is generated
by devstack while setup of openstack, changes should be made
in devstack so as to put admin_tenant_id in tempest conf file.

Change-Id: I62baf5b1e21ebf8d3b511624c54741015b304955
Closes-Bug: #1321624
Configure heat keystone client for SSL when keystone uses SSL

When SSL is enabled in Keystone, the path to the Keystone CA file
needs to be set in ca_file in the clients_keystone section.

Change-Id: Ic324e09b42a96d0ba31e13f8e8042cb3ac24d0b6
Closes-Bug: 1324207
Add basic echo_* functions for grenade

Grenade, and possibly other components, re-use parts of devstack
libraries.  This provides basic echo_* functions to avoid missing
commands in several libraries.

Change-Id: I972d6208055a8c4ca4c9bfd5383ad3c7159d5cbe
Add $TOP_DIR to the path when calling tools' scripts

The missing reference to $TOP_DIR prevent us to run stack.sh from a different
directory.

Change-Id: Ie15b89734264789bef9a8efcfdbbf2cdb89c936e
Merge "Add basic echo_* functions for grenade"
Merge "devstack should put admin_tenant_id in tempest.conf file while setup"
Merge "Configure heat keystone client for SSL when keystone uses SSL"
Merge "Add $TOP_DIR to the path when calling tools' scripts"