changes to section_cli_nova_manage_projects_security

removed extra and
applies to apply
removed “acting in” added ,
added for and . and created new sentence
added for at end of sent.
added space after group
added for at end of sent.
space between source and groups

Change-Id: I178a1e6782e189ba8df1184717d0a141f3cdd23f
Remove gateway definitions in interfaces

The interfaces templates for /etc/network/interfaces contain 2 gateway
definitions, and there is a third one configured via DHCP when the
network comes up.

Having multiple default gateways (at least configured this way) does
not work. For instance, booting into Ubuntu 12.04.4 LTS with one of
these interface definitions results in error messages ("Waiting up to
60 more seconds for network configuration", "Booting system without
full network configuration").

With the gateways removed, the network comes up without a problem and
the hosts can communicate over the API Network, the OpenStack Management
Network, and the Data Network. (And there is still a default gateway
on the NAT interfaces of each host).

Change-Id: I3ee9737c19b696d88f9897547996cddef482b7f7
Merge "Remove gateway definitions in interfaces"
Merge "changes to section_cli_nova_manage_projects_security"