Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 37699b5046ab32ebd13a4d9492bd2213ac50cefe
  - Upgrade rancher server to 1.6.26
    
    Change-Id: I898c8261058cc5ccba0e90d4d127c823d9d2ef87
    Issue-ID: INT-993
    Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
    
diff --git a/docs/submodules/integration.git b/docs/submodules/integration.git
index e2790ba..37699b5 160000
--- a/docs/submodules/integration.git
+++ b/docs/submodules/integration.git
@@ -1 +1 @@
-Subproject commit e2790bafe5aaa3fa7dc39e69487b6a85eea87d27
+Subproject commit 37699b5046ab32ebd13a4d9492bd2213ac50cefe