lpsolve: fix cache variable documentation + disable debug mode

finders/FindLPSolve.cmake

-set(CMAKE_FIND_DEBUG_MODE TRUE)
+#set(CMAKE_FIND_DEBUG_MODE TRUE)
 
-set(LPSOLVE_DIR $ENV{LPSOLVE_DIR} CACHE PATH "lpsolve directory (contain include/lp_lib.h).")
+set(LPSOLVE_DIR $ENV{LPSOLVE_DIR} CACHE PATH "lpsolve directory (contains lp_lib.h).")
 
 find_path(LPSOLVE_INCLUDE_DIR
           NAMES lp_lib.h