[INTERNAL][FIX] ie grey placeholder; border disabled hover

This fix addresses 2 issues related to inputs:
1. [HCB][IE] The placeholder text is gray on error state. According to the specs it should be white. I also noticed the warning class is not up to specs so I updated its color and background as well.
2. [HCB][BLUECRYSTAL] The border of the disabled input changes on hover. It should not change, similarly to how readonly works.

Change-Id: Iaea0684a0354094ffce32b8c977cb1b84ccfa9a5
Merge "[INTERNAL][FIX] ie grey placeholder; border disabled hover"