Improve some plugins help strings

For consistency add a "." everywhere, remove an extra space at end of a
string, add missing space between strings, fix descriptions and
capitalization.

Change-Id: Ib1523352b19768425263c09855d6a218e06e588a
Imported Translations from Transifex

Change-Id: I8676cc834921e62620d914c15755102fc637f7d3
Add functional test for IptablesManager

Introduce test of IptablesManager using filtering of ICMP packets in
namespaces.

Partial-bug: #1243216

Change-Id: I90ab0d397780247de619bd90f5febd0e59b84fc7
Apic drivers enhancements (second approach): Topology

    - Handle topology dynamically

Implements blueprint: apic-driver-enhancements

Change-Id: I80ae799bf7c18939e58cb5c1ea8eb441633285df
Merge "Imported Translations from Transifex"
Merge "Add functional test for IptablesManager"
Merge "Improve some plugins help strings"
Merge "Apic drivers enhancements (second approach): Topology"