Random number generation fix for the prescribed aerosols in CAM

[singhbalwinder]

This commit fixes the random number generation bug in prescribed
aerosols routine. Please see issue #246 for more details.The fix
make use of KISSVEC random number generator instead of the Fortran
intrinsic.

Fixes #246
[non-BFB]
AG-343

[singhbalwinder]

This commit passes the acme developer tests. It changes answers only for the prescribed aerosols run as it is using a new random number generator.

[susburrows]

merged this to "next" today.

[susburrows]

Since there are no (new) test failures on "next", I am merging this to "master".

[rljacob]

What is this tmp.branch.info file in the top level directory?

[singhbalwinder]

I create this file for my testing purposes. This should not be included in the commit and should be removed (my mistake). Should I go ahead and remove it by creating a branch or is there any other easier way to do it?

[jeff-cohere]

The most straightforward way to remove the file is to create a branch in which the file is removed, and then creating a new pull request for it.

[singhbalwinder]

Ok. Thanks Jeff. I will create a branch from the point where this branch is merged into the master, delete the file and issue a PR.

[susburrows]

Sorry, I should have caught this when reviewing the PR. Thanks for pointing it out. I'll merge Balwinder's change that removes this extraneous file.