Relax precision requirements on TransformationEstimationLM test.

[SergioRAgostinho]

This test was failing on my 18.04 environment. The demanded precision seemed tight so I bumped it up to match the translation component.

$ build/test/registration/test_registration_api test/bun0.pcd test/bun4.pcd
[==========] Running 14 tests from 1 test case.
[----------] Global test environment set-up.
[----------] 14 tests from PCL
[ RUN      ] PCL.CorrespondenceEstimation
[       OK ] PCL.CorrespondenceEstimation (1 ms)
[ RUN      ] PCL.CorrespondenceEstimationReciprocal
[       OK ] PCL.CorrespondenceEstimationReciprocal (0 ms)
[ RUN      ] PCL.CorrespondenceRejectorDistance
[       OK ] PCL.CorrespondenceRejectorDistance (1 ms)
[ RUN      ] PCL.CorrespondenceRejectorMedianDistance
[       OK ] PCL.CorrespondenceRejectorMedianDistance (0 ms)
[ RUN      ] PCL.CorrespondenceRejectorOneToOne
[       OK ] PCL.CorrespondenceRejectorOneToOne (1 ms)
[ RUN      ] PCL.CorrespondenceRejectorSampleConsensus
[       OK ] PCL.CorrespondenceRejectorSampleConsensus (2 ms)
[ RUN      ] PCL.CorrespondenceRejectorSurfaceNormal
[       OK ] PCL.CorrespondenceRejectorSurfaceNormal (2 ms)
[ RUN      ] PCL.CorrespondenceRejectorTrimmed
[       OK ] PCL.CorrespondenceRejectorTrimmed (0 ms)
[ RUN      ] PCL.CorrespondenceRejectorVarTrimmed
[       OK ] PCL.CorrespondenceRejectorVarTrimmed (1 ms)
[ RUN      ] PCL.TransformationEstimationSVD
[       OK ] PCL.TransformationEstimationSVD (0 ms)
[ RUN      ] PCL.TransformationEstimationDualQuaternion
[       OK ] PCL.TransformationEstimationDualQuaternion (0 ms)
[ RUN      ] PCL.TransformationEstimationPointToPlaneLLS
[       OK ] PCL.TransformationEstimationPointToPlaneLLS (0 ms)
[ RUN      ] PCL.TransformationEstimationLM
/home/sergio/Development/3rdparty/pcl/test/registration/test_registration_api.cpp:529: Failure
The difference between R_LM_1_float.x () and R_ref.x () is 0.00015111267566680908, which exceeds 1e-4f, where
R_LM_1_float.x () evaluates to 0.10496655851602554,
R_ref.x () evaluates to 0.10511767119169235, and
1e-4f evaluates to 9.9999997473787516e-05.
/home/sergio/Development/3rdparty/pcl/test/registration/test_registration_api.cpp:530: Failure
The difference between R_LM_1_float.y () and R_ref.y () is 0.0001913607120513916, which exceeds 1e-4f, where
R_LM_1_float.y () evaluates to -0.26260280609130859,
R_ref.y () evaluates to -0.26279416680335999, and
1e-4f evaluates to 9.9999997473787516e-05.
/home/sergio/Development/3rdparty/pcl/test/registration/test_registration_api.cpp:531: Failure
The difference between R_LM_1_float.z () and R_ref.z () is 0.00033326447010040283, which exceeds 1e-4f, where
R_LM_1_float.z () evaluates to 0.15800976753234863,
R_ref.z () evaluates to 0.15767650306224823, and
1e-4f evaluates to 9.9999997473787516e-05.
[  FAILED  ] PCL.TransformationEstimationLM (4 ms)
[ RUN      ] PCL.TransformationEstimationPointToPlane
[       OK ] PCL.TransformationEstimationPointToPlane (0 ms)
[----------] 14 tests from PCL (12 ms total)

[----------] Global test environment tear-down
[==========] 14 tests from 1 test case ran. (12 ms total)
[  PASSED  ] 13 tests.
[  FAILED  ] 1 test, listed below:
[  FAILED  ] PCL.TransformationEstimationLM

 1 FAILED TEST

[SergioRAgostinho]

This one is good to go! Registration tests are now passing.