bump go-db-helpers
bump go-db-helpers

Submodule src/code.cloudfoundry.org/go-db-helpers a3705f7..7feb096:
  > Add timeout tests for each database driver

[#144803733]

Signed-off-by: Joachim Valdez <f4115f6bcd6858c277581a1d9da83b9914dce2c3@us.ibm.com>

cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release,cloudfoundry-incubator/cf-networking-release