FieldConvert not correctly carrying <Time> variable over to .dat and .plt files
I have an `Info.xml` file outputted by `IncNavierStokesSolver` that has the following `<Metadata>` parameters:
```
<Metadata>
<Provenance>
<GitBranch>refs/heads/master</GitBranch>
<GitSHA1>0c105fe7223dd3df13764e513377c8c439b45403</GitSHA1>
<Hostname>lab-1</Hostname>
<NektarVersion>5.0.0</NektarVersion>
<Timestamp>08-Nov-2020 12:02:08</Timestamp>
</Provenance>
<ChkFileNum>401</ChkFileNum>
<FileName>CylFlow_HomoStrip_Re3900.map</FileName>
<Kinvis>0.00025641025641025641</Kinvis>
<MappingCartesianVel>False</MappingCartesianVel>
<MappingType>File</MappingType>
<SessionName0>CylFlow_HomoStrip_Re3900_xml/P0000003.xml</SessionName0>
<Time>200.00000000059092</Time>
<TimeStep>0.001</TimeStep>
</Metadata>
```
My folder structure looks like this:
```
├── CylFlow_HomoStrip_Re3900.fld
│ ├── Info.xml
│ ├── P0000000.fld
│ ├── P0000001.fld
│ ├── P0000002.fld
<---- cut ---->
│ ├── P0000030.fld
│ └── P0000031.fld
├── CylFlow_HomoStrip_Re3900.map
│ ├── Info.xml
│ ├── P0000000.fld
│ ├── P0000001.fld
│ ├── P0000002.fld
<---- cut ---->
│ ├── P0000030.fld
│ └── P0000031.fld
├── CylFlow_HomoStrip_Re3900.xml
```
I run `FieldConvert` on `CylFlow_HomoStrip_Re3900.fld`:
```
FieldConvert CylFlow_HomoStrip_Re3900.xml CylFlow_HomoStrip_Re3900.fld tecplot_output.dat
```
The header of `tecplot_output.dat` looks like this:
```
Variables = x, y, z, u, v, w, p
Zone, N=681884, E=490752, F=FEBlock, ET=BRICK
0 -0.658631 -1.30893 -1.9509 -2.58454 -3.20985 -3.82683 0 ... ... ...
```
I noticed that after importing all of my converted files for each time step there is no transient data. According to tecplot [here](https://www.tecplot.com/2018/03/26/unsteady-time-varying-data-tecplot-files/), there is a missing `SOLUTIONTIME` value in the zone header. This value should be pulled from the `<Time>` tag in the xml, but it was not carried over correctly. The `.plt` files suffer from a similar issue with regards to the `SolutionTime` parameter. While I have not inspected the `.plt` binary itself, I presume this is true due to the value being missing in tecplot.
I put together a small [repository](https://github.com/VanillaBrooks/nektar-issue) to reproduce the issue.
Am I missing something here, or perhaps misusing `FieldConvert`?
issue