Port r4847: Switch to 1.7.0 to appease the 1.8.0-hating caGrid 1.3.  Re-closes #924.
Port r4847: Switch to 1.7.0 to appease the 1.8.0-hating caGrid 1.3.  Re-closes #924.

NCIP/psc,NCIP/psc,NCIP/psc,NCIP/psc