Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 2029fd97783776ded9d42d88dea2cc919cbed3e8
  - Merge "fix sonar critical bug"
  - fix sonar critical bug

    MsoHeatUtils: remove unnecessary heatClient check for null
    1. sonar assumes that heatClient is nullable and NullPointer may be thrown in line 309
    2. heatClient is never null: method creates a new object or throws Exception
    MsoHeatUtilsTest: added tests for getHeatClient and createStack methods
    BaseTest: made CloudIdentity and CloudSite getters protected for other tests to use them
    StubOpenStack: added stubs for getStack and unsuccessful authorization
    removed unused imports

    Change-Id: Ie62c89f55d1894df48d9cc4d14760d36e96c4cb2
    Issue-ID: SO-1516
    Signed-off-by: k.kazak <k.kazak@samsung.com>