Move all data in applications to the datamodel component

As per a community discussion thread we decided to move all data (seed, seed-initial, demo) to the datamodel component. and to also reduce and cleanup this data to ease debugging and maintenance.

After moving all the data, the directory and file structure would be similar to the below:
data/
├── demo
│ ├── AccountingDemoData.xml
│ ├── CommonDemoData.xml
│ ├── ContentDemoData.xml
│ ├── HumanresDemo.xml
│ ├── ManufacturingDemoData.xml
│ ├── MarketingDemoData.xml
│ ├── OrderDemoData.xml
│ ├── PartyDemoData.xml
│ ├── ProductDemoData.xml
│ ├── ShipmentDemoData.xml
│ └── WorkEffortDemoData.xml
├── seed
│ ├── AccountingSeedData.xml
│ ├── CommonSeedData.xml
│ ├── ContentSeedData.xml
│ ├── HumanresSeedData.xml
│ ├── ManufacturingSeedData.xml
│ ├── MarketingSeedData.xml
│ ├── OrderSeedData.xml
│ ├── PartySeedData.xml
│ ├── ProductSeedData.xml
│ ├── ShipmentSeedData.xml
│ └── WorkEffortSeedData.xml
└── seed-initial
├── AccountingSeedInitialData.xml
├── CommonSeedInitialData.xml
├── ContentSeedInitialData.xml
├── HumanresSeedInitialData.xml
├── ManufacturingSeedInitialData.xml
├── MarketingSeedInitialData.xml
├── OrderSeedInitialData.xml
├── PartySeedInitialData.xml
├── ProductSeedInitialData.xml
├── ShipmentSeedInitialData.xml
└── WorkEffortSeedInitialData.xml