modified arch modules to support RSNT_CUSTOM_ROOT too

Author: mboisson

modules/arch/avx.lua

@@ -1,4 +1,5 @@
 if (mode() ~= "spider") then
-	prepend_path("MODULEPATH","/cvmfs/soft.computecanada.ca/custom/modules-avx")
+	local custom_root = os.getenv("RSNT_CUSTOM_ROOT") or "/cvmfs/soft.computecanada.ca/custom"
+	prepend_path("MODULEPATH", custom_root .. "/modules-avx")
 	setenv("EBVERSIONARCH","avx")
 end

modules/arch/avx2.lua

@@ -1,4 +1,5 @@
 if (mode() ~= "spider") then
-	prepend_path("MODULEPATH","/cvmfs/soft.computecanada.ca/custom/modules-avx2")
+	local custom_root = os.getenv("RSNT_CUSTOM_ROOT") or "/cvmfs/soft.computecanada.ca/custom"
+	prepend_path("MODULEPATH", custom_root .. "/modules-avx2")
 	setenv("EBVERSIONARCH","avx2")
 end

modules/arch/avx512.lua

@@ -1,4 +1,5 @@
 if (mode() ~= "spider") then
-	prepend_path("MODULEPATH","/cvmfs/soft.computecanada.ca/custom/modules-avx512")
+	local custom_root = os.getenv("RSNT_CUSTOM_ROOT") or "/cvmfs/soft.computecanada.ca/custom"
+	prepend_path("MODULEPATH", custom_root .. "/modules-avx512")
 	setenv("EBVERSIONARCH","avx512")
 end

modules/arch/sse3.lua

@@ -1,4 +1,5 @@
 if (mode() ~= "spider") then
-	prepend_path("MODULEPATH","/cvmfs/soft.computecanada.ca/custom/modules-sse3")
+	local custom_root = os.getenv("RSNT_CUSTOM_ROOT") or "/cvmfs/soft.computecanada.ca/custom"
+	prepend_path("MODULEPATH", custom_root .. "/modules-sse3")
 	setenv("EBVERSIONARCH","sse3")
 end