eclipses: standardize name/version attributes

* set pname rather than name in the generateEclipse function

* use the standard 'version' attribute name rather than the ad-hoc
  'productVersion' attribute when calling buildEclipseUnversioned

* pass 'pname' and 'version' through to mkDerivation, and let it
  derive 'name', per standard convention

* update generation of the '-configuration' argument to use 'version'

fixes:

    The derivation has no version attribute, so do not know how to figure out the version while doing an updateScript update

... during automated update process introduced in 5bb31f9518

pkgs/applications/editors/eclipse/build-eclipse.nix

@@ -21,15 +21,15 @@
 }:
 
 {
-  name,
+  pname,
   src ? builtins.getAttr stdenv.hostPlatform.system sources,
   sources ? null,
   description,
-  productVersion,
+  version,
 }:
 
 stdenv.mkDerivation rec {
-  inherit name src;
+  inherit pname version src;
 
   desktopItem = makeDesktopItem {
     name = "Eclipse";
@@ -98,7 +98,7 @@ stdenv.mkDerivation rec {
       } \
       --prefix GIO_EXTRA_MODULES : "${glib-networking}/lib/gio/modules" \
       --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH" \
-      --add-flags "-configuration \$HOME/.eclipse/''${productId}_${productVersion}/configuration"
+      --add-flags "-configuration \$HOME/.eclipse/''${productId}_${version}/configuration"
 
     # Create desktop item.
     mkdir -p $out/share/applications

pkgs/applications/editors/eclipse/default.nix

@@ -70,9 +70,7 @@ let
   };
   buildEclipse =
     eclipseData:
-    buildEclipseUnversioned (
-      eclipseData // { productVersion = "${platform_major}.${platform_minor}"; }
-    );
+    buildEclipseUnversioned (eclipseData // { version = "${platform_major}.${platform_minor}"; });
 
   generateEclipse =
     id:
@@ -85,7 +83,7 @@ let
       {
         name = "eclipse-${lib.strings.toLower id}";
         value = buildEclipse {
-          name = "eclipse-${lib.strings.toLower id}-${platform_major}.${platform_minor}";
+          pname = "eclipse-${lib.strings.toLower id}";
           inherit description;
           src = fetchurl {
             url =