*: Factor-out NumPy version into component/numpy/

Move `numpy=1.16.4` from all over the place into component/numpy.
Don't move if a different numpy version is used, or it looks like a
software cares to use exactly particular version.
Downgrade pygolang/test.cfg from numpy=1.16.6 to numpy=1.16.4 and use
common numpy component version - using numpy=1.16.6 is not required for
pygolang testing and so this downgrade is acceptable. It will be better
to upgrade NumPy to latest in component/numpy/ as a future separate step.

See previous patch where it was decided and explained that version for
component <X> lives in component/X/.

component/numpy/buildout.cfg

@@ -4,3 +4,7 @@ parts = numpy
 [numpy]
 recipe = zc.recipe.egg:custom
 egg = numpy
+
+
+[versions]
+numpy = 1.16.4

component/pygolang/test.cfg

@@ -4,6 +4,7 @@
 extends =
     ../../stack/nxdtest.cfg
     ../pytest/buildout.cfg
+    ../numpy/buildout.cfg
     buildout-dev.cfg
 
 parts =
@@ -46,7 +47,6 @@ template = inline:
 
 
 [versions]
-numpy   = 1.16.6
 ipython = 5.10.0
 ipython-genutils = 0.2.0
 

software/caddy-frontend/software.cfg

@@ -11,6 +11,7 @@ extends =
   ../../component/6tunnel/buildout.cfg
   ../../component/xz-utils/buildout.cfg
   ../../component/rsyslogd/buildout.cfg
+  ../../component/numpy/buildout.cfg
   ../../component/haproxy/buildout.cfg
   ../../component/nginx/buildout.cfg
 
@@ -251,7 +252,6 @@ pycrypto = 2.6.1
 rdiff-backup = 1.0.5+SlapOSPatched001
 slapos.recipe.template = 4.4
 smmap = 0.9.0
-numpy = 1.16.4
 
 websockify = 0.8.0
 furl = 2.1.0

software/cython-test/software.cfg

@@ -102,5 +102,4 @@ context =
 [versions]
 slapos.recipe.template = 4.4
 coverage = 4.5.1
-numpy = 1.16.4
 pycodestyle = 2.5.0

software/dream/software.cfg

@@ -40,7 +40,6 @@ rpy2 = 2.4.0
 pydot = 1.0.28
 xlrd = 0.9.3
 xlwt = 0.7.5
-numpy = 1.16.4
 scipy = 0.13.3
 simpy = 3.0.5
 zope.dottedname = 4.1.0

software/kvm/software.cfg

@@ -10,6 +10,7 @@ extends =
   ../../component/netcat/buildout.cfg
   ../../component/lxml-python/buildout.cfg
   ../../component/pycurl/buildout.cfg
+  ../../component/numpy/buildout.cfg
   ../../component/gzip/buildout.cfg
   ../../stack/slapos.cfg
   ../../component/nodejs/buildout.cfg
@@ -206,4 +207,3 @@ gitdb = 0.6.4
 pycurl = 7.43.0
 slapos.recipe.template = 4.4
 smmap = 0.9.0
-numpy = 1.16.4

software/neotest/software.cfg

@@ -18,6 +18,7 @@ extends =
     ../../component/coreutils/buildout.cfg
     ../../component/util-linux/buildout.cfg
     ../../component/pygolang/buildout.cfg
+    ../../component/numpy/buildout.cfg
     ../../stack/nxdtest.cfg
 
 
@@ -106,7 +107,7 @@ eggs    =
 # wendelin.core still requires ZODB3 but having ZODB4 or 5 installed satisfies latest ZODB3
     ZODB3
 # also for wc
-    numpy
+    ${numpy:egg}
 # to install not only wendelin.core modules but also scripts
     wendelin.core
 # for ZEO scripts (runzeo)
@@ -124,7 +125,6 @@ revision= v0.11-15-gf785ac079b
 # ping eggs versions
 [versions]
 ZODB3 = 3.11.0
-numpy = 1.16.4
 zope.testing = 4.6.2
 
 # Required by: