CSIT rls1704 report - update to handcrafted sections:

CSIT rls1704 report - update to handcrafted sections:
- index.rst
- vpp_performance_tests/csit_release_notes
- vpp_performance_tests/overview.rst
- vpp_performance_tests/packet_throughput_graphs/...
- testpmd_performance_tests/csit_release_notes.rst
- vpp_functional_tests/csit_release_notes.rst
- testpmd_performance_tests/packet_latency_graphs/...
- testpmd_performance_tests/packet_throughput_graphs/...

Change-Id: I06bd27bc30d06d69873da74756ca586e12e55643
Signed-off-by: Maciek Konstantynowicz <mkonstan@cisco.com>
(cherry picked from commit 02f2a2176ec92efdf63399fb7dba1eb586465f38)