Description of problem:

Several cartridges have erb templates in their env directory.  rhcsh tries to source them resulting in ugly errors:

bash: export: `OPENSHIFT_MYSQL_DB_LOG_DIR.erb=<%= ENV['OPENSHIFT_MYSQL_DIR'] %>/log/': not a valid identifier
bash: export: `OPENSHIFT_MYSQL_DB_SOCKET.erb=<%= ENV['OPENSHIFT_MYSQL_DIR'] %>/socket/mysql.sock': not a valid identifier
bash: export: `OPENSHIFT_PHP_LOG_DIR.erb=<%= ENV['OPENSHIFT_PHP_DIR'] %>/logs/': not a valid identifier
bash: export: `OPENSHIFT_PHP_LOG_DIR.erb=<%= ENV['OPENSHIFT_PHP_DIR'] %>/logs/': not a valid identifier