freelist: Fix unit test initialization

The freelist and scheduler unit tests were recently broken by
the change to freelist to allocate page-size boundary regions
when growing.  Fix the unit tests by specifying the system page
size (which is initialized during the core init function).

This is really a temporary fix, but we need to do some refactoring
of the code base to better handle unit testing.  Until we do that,
this works well enough.

Signed-off-by: Brian Barrett <[email protected]>
(cherry picked from commit ff843c6)

tests/unit/freelist.c

@@ -19,6 +19,10 @@ int regmr_simple(void *opaque, void *data, size_t size, void **handle)
 	simple_base = data;
 	simple_size = size;
 
+	if (size % system_page_size != 0) {
+		return ncclSystemError;
+	}
+
 	return ncclSuccess;
 }
 
@@ -47,6 +51,7 @@ int main(int argc, char *argv[])
 	int ret;
 	size_t i;
 
+	system_page_size = 4096;
 	ofi_log_function = logger;
 
 	/* initial size larger than max size */

tests/unit/scheduler.c

@@ -366,6 +366,7 @@ int main(int argc, char *argv[])
 {
 	int ret = 0;
 	ofi_log_function = logger;
+	system_page_size = 4096;
 
 	ret = test_multiplexing_schedule() || test_threshold_scheduler();