Bug 573171 support old way of storing keys in 2.0.0

[eparovyshnaya]

• implement (pub+scr) -> (.keys_xmi) conversion in 'ConvertedKeys'
• employ the converter in a ui handle (unplugged)

Signed-off-by: eparovyshnaya [email protected]

[codecov]

Codecov Report

Merging #770 (2578ae3) into master (06fd54a) will decrease coverage by 0.19%.
The diff coverage is 0.77%.

@@             Coverage Diff              @@
##             master     #770      +/-   ##
============================================
- Coverage     35.30%   35.10%   -0.20%     
  Complexity      346      346              
============================================
  Files          1010     1015       +5     
  Lines         21495    21620     +125     
  Branches       1267     1271       +4     
============================================
+ Hits           7588     7590       +2     
- Misses        13509    13632     +123     
  Partials        398      398              

Impacted Files	Coverage Δ	Complexity Δ
.../loc/internal/products/core/ConvertKeysReport.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...sage/loc/internal/products/core/ConvertedKeys.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...sage/loc/internal/products/core/KeyPairStored.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...ge/loc/internal/products/core/KeyPairUpgraded.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...loc/internal/products/core/ProductVersionKeys.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...internal/products/core/i18n/ConverterMessages.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...ge/loc/products/ui/handlers/ConvertKeysHandle.java	0.00% <0.00%> (ø)	0.00 <0.00> (?)
...org/eclipse/passage/lic/internal/bc/BcKeyPair.java	91.48% <100.00%> (+0.18%)	0.00 <0.00> (ø)
... and 4 more

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