software/theia: use nodejs 14, remove explicit python2.7

Since https://github.com/eclipse-theia/theia/pull/10343 theia depend on
nodejs >= 12 and they test on 12 and 14. Use 14 to have an officially
tested version.

This removes the strong requirement to have python2.7 in theia, so we
just use the software python, which might be python3

software/theia/software.cfg

@@ -44,7 +44,7 @@ max_version = 0
 
 
 [nodejs]
-<= nodejs-12.18.3
+<= nodejs-14.16.0
 
 [yarn]
 <= yarn-1.17.3
@@ -348,7 +348,7 @@ install +=
 
 
 [cli-utilities]
-PATH = ${nodejs:location}/bin:${bash:location}/bin:${fish-shell:location}/bin:${tig:location}/bin:${vim:location}/bin:${tmux:location}/bin:${git:location}/bin:${curl:location}/bin:${python2.7:location}/bin:${buildout:bin-directory}
+PATH = ${nodejs:location}/bin:${bash:location}/bin:${fish-shell:location}/bin:${tig:location}/bin:${vim:location}/bin:${tmux:location}/bin:${git:location}/bin:${curl:location}/bin:${python:location}/bin:${buildout:bin-directory}
 
 
 [theia-wrapper]

[Jérome Perrin]

I created an instance on python2 to try and everything was working so I applied this commit

/cc @xavier_thompson