Locations database violates primary key constraint

[i077]

When a new Repository is created, the app force quits with an exception:

    #################################################################
    Error Code : 1555 (SQLITE_CONSTRAINT_PRIMARYKEY)
    Caused By : Abort due to constraint violation.
    	(UNIQUE constraint failed: Location.LocationName (code 1555))
    #################################################################
        at android.database.sqlite.SQLiteConnection.nativeExecuteForLastInsertedRowId(Native Method)
        at android.database.sqlite.SQLiteConnection.executeForLastInsertedRowId(SQLiteConnection.java:952)
        at android.database.sqlite.SQLiteSession.executeForLastInsertedRowId(SQLiteSession.java:788)
        at android.database.sqlite.SQLiteStatement.executeInsert(SQLiteStatement.java:86)
        at android.arch.persistence.db.framework.FrameworkSQLiteStatement.executeInsert(FrameworkSQLiteStatement.java:50)
        at android.arch.persistence.room.EntityInsertionAdapter.insert(EntityInsertionAdapter.java:80)
        at edu.cwru.students.cwrumapper.user.DaoLocations_Impl.insertAll(DaoLocations_Impl.java:45)
        at edu.cwru.students.cwrumapper.user.Repository.<init>(Repository.java:25)
        at edu.cwru.students.cwrumapper.MainActivity.onCreate(MainActivity.java:88)
        at android.app.Activity.performCreate(Activity.java:7183)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1220)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2908)
        	... 10 more

This happens when Locations.populateData() tries to return a nonempty Location array.

[i077]

Fixed with 4e8299f.