Rationalize some of the variable names in Solver::Options.

lm_max_diagonal -> max_lm_diagonal
lm_min_diagonal -> min_lm_diagonal
linear_solver_max_num_iterations -> max_linear_solver_iterations
linear_solver_min_num_iterations -> min_linear_solver_iterations

This follows the pattern for the other parameters in Solver::Options
where, the max/min is the first word followed by the name of the
parameter.

Change-Id: I0893610fceb6b7983fdb458a65522ba7079596a7
diff --git a/internal/ceres/dogleg_strategy_test.cc b/internal/ceres/dogleg_strategy_test.cc
index caa397e..ace635f 100644
--- a/internal/ceres/dogleg_strategy_test.cc
+++ b/internal/ceres/dogleg_strategy_test.cc
@@ -84,8 +84,8 @@
     x_.resize(6);
     x_.setZero();
 
-    options_.lm_min_diagonal = 1.0;
-    options_.lm_max_diagonal = 1.0;
+    options_.min_lm_diagonal = 1.0;
+    options_.max_lm_diagonal = 1.0;
   }
 };
 
@@ -112,8 +112,8 @@
     x_.resize(6);
     x_.setZero();
 
-    options_.lm_min_diagonal = 1.0;
-    options_.lm_max_diagonal = 1.0;
+    options_.min_lm_diagonal = 1.0;
+    options_.max_lm_diagonal = 1.0;
   }
 };