Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8ef504fa4b7117af1138d653106c9aa328d0522a
  - Merge "fix critical sonar bugs"
  - fix critical sonar bugs

    Restore interrupted state when InterruptedException is thrown in SDNCRestClient
    Added test for this case
    Replaced formatting anchor with text empty object in GraphInventoryResultWrapper
    Escaped anchor is also considered as bug by sonar
    Case is already covered in AAIResultWrapperTest
    Marked comparison of the same object as false positive in EqualsAndHashCodeTester
    Added clearer comment to this comparison

    Change-Id: I24496c2323c33599db99a3d3b59fc4f6a008cf1f
    Issue-ID: SO-1492
    Signed-off-by: k.kazak <k.kazak@samsung.com>