Merge branch 'fix-icon-vtable' into release-v4.5 (PR #223)

This merge modifies the recently added Vtable.ICONm and Vtable.ICONp Vtables for
ICON model-level and pressure-level data to avoid writing SPECHUMD and GEOPT to
intermediate files. GEOPT is not needed, since HGT is calculated by ungrib, and
SPECHUMD is not needed because RH can be calculated.

* fix-icon-vtable:
  no need to write GEOPT and SPECHUMD in intermediate file

Author: mgduda

ungrib/Variable_Tables/Vtable.ICONm

@@ -6,9 +6,9 @@ Param| Type |Level1|Level2| Name     | Units   | Description
   11 | 109  |   *  |      | TT       | K       | Temperature                             |  0  |  0  |  0  | 150 |
   33 | 109  |   *  |      | UU       | m s-1   | U                                       |  0  |  2  |  2  | 150 |
   34 | 109  |   *  |      | VV       | m s-1   | V                                       |  0  |  2  |  3  | 150 |
-  51 | 109  |   *  |      | SPECHUMD | kg kg-1 | Specific Humidity                       |  0  |  1  |  0  | 150 |
+  51 | 109  |   *  |      | SPECHUMD | kg kg-1 |                                         |  0  |  1  |  0  | 150 |
   11 | 105  |   2  |      | TT       | K       | Temperature       at 2 m                |  0  |  0  |  0  | 103 |
-  51 | 105  |   2  |      | SPECHUMD | kg kg-1 | Specific Humidity at 2 m                |  0  |  1  |  0  | 103 |
+  51 | 105  |   2  |      | SPECHUMD | kg kg-1 |                                         |  0  |  1  |  0  | 103 |
   52 | 105  |   2  |      | RH       | %       | Relative Humidity at 2 m                |  0  |  1  |  1  | 103 |
   33 | 105  |  10  |      | UU       | m s-1   | U                 at 10 m               |  0  |  2  |  2  | 103 |
   34 | 105  |  10  |      | VV       | m s-1   | V                 at 10 m               |  0  |  2  |  3  | 103 |

ungrib/Variable_Tables/Vtable.ICONp

@@ -5,7 +5,7 @@ Param| Type |Level1|Level2| Name     | Units   | Description
   33 | 100  |   *  |      | UU       | m s-1   | U                                       |  0  |  2  |  2  | 100 |
   34 | 100  |   *  |      | VV       | m s-1   | V                                       |  0  |  2  |  3  | 100 |
   52 | 100  |   *  |      | RH       | %       | Relative Humidity                       |  0  |  1  |  1  | 100 |
- 129 | 100  |   *  |      | GEOPT    | m2 s-2  | Geopotential                            |  0  |  3  |  4  | 100 |
+ 129 | 100  |   *  |      | GEOPT    | m2 s-2  |                                         |  0  |  3  |  4  | 100 |
      | 100  |   *  |      | HGT      | m       | Height                                  |     |     |     | 100 |
   11 | 105  |   2  |      | TT       | K       | Temperature       at 2 m                |  0  |  0  |  0  | 103 |
   33 | 105  |  10  |      | UU       | m s-1   | U                 at 10 m               |  0  |  2  |  2  | 103 |