equil test decks: make them feature one time step

the output writing code has issues if no time steps are specified...

tests/equil_base.DATA

@@ -113,3 +113,6 @@ PRESSURE
 SUMMARY
 
 SCHEDULE
+
+TSTEP
+1 /

tests/equil_capillary.DATA

@@ -84,4 +84,6 @@ EQUIL
 
 -------------------------------------
 SCHEDULE
--- empty section
+
+TSTEP
+1 /

tests/equil_capillary_overlap.DATA

@@ -121,6 +121,9 @@ SEPARATE
 
 SCHEDULE  ======
 
+TSTEP
+1 /
+
 RPTSCHED
 'PRES' 'PGAS' 'PWAT' 'SOIL' 'SWAT' 'SGAS' 'RESTART=3' 'NEWTON=2' /
 

tests/equil_capillary_swatinit.DATA

@@ -99,4 +99,7 @@ RPTSOL
 /
 -------------------------------------
 SCHEDULE
--- empty section
+
+TSTEP
+1 /
+

tests/equil_deadfluids.DATA

@@ -85,4 +85,7 @@ EQUIL
 
 -------------------------------------
 SCHEDULE
--- empty section
+
+TSTEP
+1 /
+

tests/equil_livegas.DATA

@@ -124,6 +124,9 @@ SEPARATE
 
 SCHEDULE  ======
 
+TSTEP
+1 /
+
 RPTSCHED
 'PRES' 'PGAS' 'PWAT' 'SOIL' 'SWAT' 'SGAS' 'RS' 'RESTART=3' 'NEWTON=2' /
 

tests/equil_liveoil.DATA

@@ -133,6 +133,9 @@ SEPARATE
 
 SCHEDULE  ======
 
+TSTEP
+1 /
+
 RPTSCHED
 'PRES' 'PGAS' 'PWAT' 'SOIL' 'SWAT' 'SGAS' 'RS' 'RESTART=3' 'NEWTON=2' /
 

tests/equil_pbvd_and_pdvd.DATA

@@ -145,6 +145,9 @@ SEPARATE
 
 SCHEDULE  ======
 
+TSTEP
+1 /
+
 RPTSCHED
 'PRES' 'PGAS' 'PWAT' 'SOIL' 'SWAT' 'SGAS' 'RS' 'RESTART=3' 'NEWTON=2' /
 

tests/equil_rsvd_and_rvvd.DATA

@@ -144,6 +144,9 @@ SEPARATE
 
 SCHEDULE  ======
 
+TSTEP
+1 /
+
 RPTSCHED
 'PRES' 'PGAS' 'PWAT' 'SOIL' 'SWAT' 'SGAS' 'RS' 'RESTART=3' 'NEWTON=2' /