importing more indicators, more configurations changes, SQL changes

Renaming 7_metadata.sql to 6_metadata.sql

Renaming 6_samples-for-xls-overview.sql to
7_samples-for-xls-overview.sql
Merge remote-tracking branch 'origin/importer-and-sql-startup-changes'
Making the start date mandatory again for Indicators
Merge remote-tracking branch 'origin/importer-and-sql-startup-changes'