IMU factor with Gravity Estimation #3577

Job	Run time
ubuntu-clang-deprecated Debug	22m 48s
ubuntu-clang-deprecated Release	24m 17s
ubuntu-clang-quaternions Debug	24m 21s
ubuntu-clang-quaternions Release	24m 19s
ubuntu-clang-tbb Debug	25m 2s
ubuntu-clang-tbb Release	26m 14s
ubuntu-clang-cayleymap Debug	22m 50s
ubuntu-clang-cayleymap Release	24m 37s
ubuntu-clang-system-libs Debug	24m 8s
ubuntu-clang-system-libs Release	24m 22s
ubuntu-no-boost Debug	19m 35s
ubuntu-no-boost Release	20m 12s
ubuntu-no-unstable Debug	19m 3s
ubuntu-no-unstable Release	20m 3s
ubuntu-build-examples Debug	23m 16s
ubuntu-build-examples Release	24m 56s
	6h 10m 3s

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