Update psutil from 4.0.0 to 5.7.0

psutil 4.0.0 is quite old, and only lists support for python 3.4. We'll
need support for python 3.6 and 3.8 as we update to python3.
Authored-by: NTyler Ramer <tramer@pivotal.io>

gpMgmt/bin/Makefile

@@ -111,7 +111,7 @@ subprocess32:
 #
 # PSUTIL
 #
-PSUTIL_VERSION=4.0.0
+PSUTIL_VERSION=5.7.0
 PSUTIL_DIR=psutil-$(PSUTIL_VERSION)
 
 psutil:

ext @ 3351cf76

-Subproject commit 0979c35672328ccdeaa0f8c3f2ac5c2d4aa4ce0f
+Subproject commit 3351cf76d50e150ef5d3e9bf7a5d85cd7af0a2c8

python-dependencies.txt

@@ -7,6 +7,6 @@ logilab-common==0.50.1
 MarkupSafe==1.0
 mock==1.0.1
 parse==1.8.2
-psutil==4.0.0
+psutil==5.7.0
 setuptools==36.6.0
 unittest2==0.5.1