Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to 66e060ad9d7605e388352c3c25c7ec433d3fa01c
  - Do not use maven stage plugin

    This plugin is about to expire and Sonatype
    will not continue supporting it.
    Remove this plugin to avoid binaries being
    shipped before signing.

    Change-Id: I6dc28938fdd43a7bce219c5c89fbe7a2cd83f47e
    Issue-ID: CIMAN-250
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>

diff --git a/docs/submodules/externalapi/nbi.git b/docs/submodules/externalapi/nbi.git
index 8cf23e9..66e060a 160000 (submodule)
--- a/docs/submodules/externalapi/nbi.git
+++ b/docs/submodules/externalapi/nbi.git
@@ -1 +1 @@
-Subproject commit 8cf23e9111009f360df9215d45118f540ed3fde6
+Subproject commit 66e060ad9d7605e388352c3c25c7ec433d3fa01c