[partition] Allow a configurable swap Partition name

This commit adds the new configuration `swapPartitionName` to the file
partition.conf.

This option sets the partition name to the swap partition that is
created. If this option is unset, the partition is left unnamed.

src/modules/partition/core/PartitionActions.cpp

@@ -203,6 +203,10 @@ doAutopartition( PartitionCoreModule* core, Device* dev, Choices::AutoPartitionO
                                                                      KPM_PARTITION_FLAG( None ) );
         }
         PartitionInfo::setFormat( swapPartition, true );
+        if ( gs->contains( "swapPartitionName" ))
+        {
+            swapPartition->setLabel( gs->value( "swapPartitionName" ).toString() );
+        }
         core->createPartition( dev, swapPartition );
     }
 

src/modules/partition/gui/PartitionViewStep.cpp

@@ -543,6 +543,12 @@ PartitionViewStep::setConfigurationMap( const QVariantMap& configurationMap )
         gs->insert( "efiSystemPartitionName", CalamaresUtils::getString( configurationMap, "efiSystemPartitionName" ) );
     }
 
+    // Read and parse key swapPartitionName
+    if ( configurationMap.contains( "swapPartitionName" ) )
+    {
+        gs->insert( "swapPartitionName", CalamaresUtils::getString( configurationMap, "swapPartitionName" ) );
+    }
+
     // OTHER SETTINGS
     //
     gs->insert( "drawNestedPartitions", CalamaresUtils::getBool( configurationMap, "drawNestedPartitions", false ) );

src/modules/partition/partition.conf

@@ -48,6 +48,10 @@ userSwapChoices:
     # - reuse     # Re-use existing swap, but don't create any (unsupported right now)
     - file      # To swap file instead of partition
 
+# This optional setting specifies the name of the swap partition.
+# If nothing is specified, the partition name is left unset.
+# swapPartitionName:      swap
+
 # LEGACY SETTINGS (these will generate a warning)
 # ensureSuspendToDisk:    true
 # neverCreateSwap:        false