Update git submodules

* Update docs/submodules/vfc/nfvo/lcm.git from branch 'master'
  to e21d3e267140135cc7124a7cfce336e55a2d44b9
  - resolve python2->python3 issues

    change base64 code

    Change-Id: I092efe7d586297a6389150b72c2f80fced1f7a2f
    Issue-ID: VFC-1429
    Signed-off-by: maopengzhang <zhang.maopeng1@zte.com.cn>

diff --git a/docs/submodules/vfc/nfvo/lcm.git b/docs/submodules/vfc/nfvo/lcm.git
index 1757a7e..e21d3e2 160000 (submodule)
--- a/docs/submodules/vfc/nfvo/lcm.git
+++ b/docs/submodules/vfc/nfvo/lcm.git
@@ -1 +1 @@
-Subproject commit 1757a7e0f63f892200d680bb228db19ec993d1a2
+Subproject commit e21d3e267140135cc7124a7cfce336e55a2d44b9