[rqd] Fix swap memory on Linux (#1447)

- Add the render host's total_mem, total_swap in the initMachineStats
function.
- Specify file encoding when opening `/proc/meminfo`.

This logic was removed on 18/Dec/2018 at 11:04 in the pull request: Add
build and packaging for RQD. (#48), cfd6e6b

Author: ramonfigueiredo

rqd/rqd/rqmachine.py

@@ -29,6 +29,7 @@
 from builtins import range
 from builtins import object
 
+import codecs
 import ctypes
 import errno
 import logging
@@ -618,6 +619,14 @@ def __initMachineStats(self, pathCpuInfo=None):
                     # An entry without data
                     elif len(lineList) == 1:
                         currCore[lineList[0]] = ""
+
+                # Reads information from /proc/meminfo
+                with codecs.open(rqd.rqconstants.PATH_MEMINFO, "r", encoding="utf-8") as fp:
+                    for line in fp:
+                        if line.startswith("MemTotal"):
+                            self.__renderHost.total_mem = int(line.split()[1])
+                        elif line.startswith("SwapTotal"):
+                            self.__renderHost.total_swap = int(line.split()[1])
         else:
             hyperthreadingMultiplier = 1