Fix exception message to say *clearTable*, not *clearReport*.
Fix exception message to say *clearTable*, not *clearReport*.

[skip ci]

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core