Revert 291c42f896d0da61125ec654ff6a67a42a8236cd commit

[ikruchynskyi]

This reverts commit 291c42f.

Reverts changes which introduced the bug into m2install.sh:

Steps to reproduce:

1. Collect code and DB dumps
2. Navigate to folder which contains code and DB dumps archives.
3. Run m2install.sh

Actual result:
/usr/local/bin/m2install.sh: line 324: -r: command not found
As a result m2install will produce output like the next during DB dump restoration:

ERROR 1046 (3D000) at line 7184: No database selected
ERROR 1046 (3D000) at line 7187: No database selected
ERROR 1046 (3D000) at line 7207: No database selected
ERROR 1046 (3D000) at line 7210: No database selected

Expected result:
m2install.sh should be able to determine DB name to run DB dump import without issues.

Link to the failing code line: https://github.com/yvoronoy/m2install/blob/master/m2install.sh#L324