Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 81f26b4c1837c9f8ff49619782fe01d99f4f0683
  - Close input streams via try-with-resources

    DefaultDmaapPropertiesImpl: close FileInputStream after loading
    ServicePluginFactory: close HttpClient if processing fails
    close application.properties InputStream after loading
    remove redundant catch block if behavior is the same
    add logging of exception in finally block
    BpmnInstaller: close csarFile if processing fails

    Change-Id: Ic6f942c401277c5150c5cc1297aba27ccd40694c
    Coverity-scan: CID-203903, CID-211476, CID-211615, CID-219308
    Issue-ID: SO-2211
    Signed-off-by: k.kazak <k.kazak@samsung.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 5b17afb..81f26b4 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 5b17afb416e3ab2d3f58694d275e67f20af5a1c6
+Subproject commit 81f26b4c1837c9f8ff49619782fe01d99f4f0683