rename local variables for clarity (#1715)

* AndroidConfigChooser: rename "choosenConfig" -> "chosenConfig"

* rename "glfwkey" -> "glfwKey"

* GltfLoader: rename "znear"/"zfar" -> "zNear"/"zFar"

* LightProbeFactory: rename "progres" -> "faceProgress"

* LwjglContext: rename "vers" -> "version"

* LWJGLOpenVRMouseManager: rename "Xamount"/"Yamount"

* MathUtils: rename "numer"/"denom" -> "numerator"/"denominator"

* PerturbFilter: rename "noisex"/"noisey"/"perturbx"/"perturby"

* PFMLoader: rename "needEndienFlip" -> "needEndianFlip"

* SpotLight: rename "dsqr" -> "dSquared"

* TestBatchNode: rename "boxshape4" -> "boxShape4"

* Utils: rename "errname" -> "errorName"