fix IndexError with storing net in postgreSQL

[HaiQ31]

networks in the future scenarios 1 and 2 contains % char in the headings of csv StorageProfiles.csv and in the body of Storage.csv. This leads to IndexError: tuple index out of range raised by psycopg2 method execute_batch which is called from pandapowers function upload_sql_table.

Pandapowers SQL method creates tables for every dataframe in a net-object or in a dict in the net-object. In this way profiles_storage is created with column names equal to the names in the dataframe.
The reasons for the error seems to be, that execute_batch kind of "counts" the locations where to put values in the sql string by the number or % in the base sql string. Since the names of StorageProfiles contains % it tries to access more items in the tuple of values than the tuple contains.

with the PR, the % in all profile names (only occurs in Storages) are replaced by pr.