temporary fix for FirstRun/LastRun wrong data type
remove tier0mode from PhEDExInjector

The Tier0Mode as originally implemented won't work and it's functionality will be taken over by some new generic mechanism.
Merge pull request #5522 from hufnagel/remove-tier0mode

remove tier0mode from PhEDExInjector
Merge pull request #5472 from amaltaro/cast-runNumbers

temporary fix for FirstRun/LastRun wrong data type
Add option to not clean the env in Scram.py

The scriptExe functionality of CRAB3 is using this library
(Scram.py), but it would be nice to avoid cleaning the environment so that
variables like X509_USER_PROXY can be used for example.
Notice that the CMSSW.py executors also does not clean the env for
cmsRun.
Merge pull request #5525 from mmascher/master

Add option to not clean the env in Scram.py
1.0.3.pre1

Signed-off-by: Seangchan Ryu <sryu@fnal.gov>
Merge branch 'master' of https://github.com/dmwm/WMCore into reqmgr2

Conflicts:
	CHANGES
Merge pull request #5544 from ticoann/reqmgr2

Reqmgr2